Machine learning lib recommendations for string generation?

The following is a sample of my string, it describes the content inside an image which is formed by image blocks. Each word in this string is a descriptive info of a image block's shape, foreground/background colors or orientation.

I wanted to give the machine learning lib hundreds of thousands of strings like the following as input data. After the training, I wanted the library to automatically output strings which are strictly compliant to the current string format, so that I can translate the generated string as image that contains the autogenerated sub strings.

Any recommendations?

"Uni Uni Uni Uni Lefty Uni Uni Lefty Lefty Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Slash Uni Uni Uni Uni Uni Lefty Duo Lefty Uni Slash Slash Uni Uni Uni Uni Uni Uni Uni Quarter Duo Duo Uni Uni Uni Uni Uni Uni Slash Righty Slash Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Quarter Duo Duo Slash Slash Uni Uni Uni Uni Lefty Righty Righty Lefty Lefty Uni Uni Uni Uni Uni Uni Uni Uni Righty Uni Uni Uni Uni Lefty Uni Pie Pie Uni Uni Uni Uni Uni Righty Righty Lefty Lefty Righty Uni Uni Uni Uni Uni Uni Sun Uni Uni Uni Uni Uni Uni Uni Pie Pie Uni Uni Uni Uni Righty Uni Uni Uni Pie Pie Uni Uni Uni Righty Uni Uni Sun Uni Uni Uni Uni Uni Righty Uni Righty Uni Uni Uni Uni Uni Uni Righty Uni Uni Pie Pie Uni Uni Uni Righty Uni Righty Righty Leaf Leaf Leaf Uni Uni Duo Righty Uni Uni Uni Uni Uni Uni Uni Lefty Pie Lefty Righty Slash Leaf Leaf Uni Uni Uni Uni Uni Leaf Leaf Leaf Leaf Uni Uni Uni Uni Uni Uni Lefty Righty Uni Uni Uni Uni Uni Uni Uni Leaf Leaf Uni Lefty Uni Uni Uni Uni Uni Uni Righty Uni Uni Pie Uni Slash Uni Uni Uni Uni Uni Lefty Uni Uni Uni Uni Slash Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Slash Righty Uni Hill Lefty Righty Uni Slash Uni Uni Uni Uni Uni Uni Uni Uni Uni Slash Hill Righty Hill Slash Uni Uni Righty Slash Lefty Lefty Uni Uni Uni Uni Uni Righty Righty Uni Uni Righty Uni Uni Uni Uni Uni Uni Slash Uni Lefty Duo Duo Duo Righty Slash Uni Righty Righty Uni Uni Uni Uni Uni Uni Uni Uni Slash Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni Uni #0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 F3ECE2 0063A5 0063A5 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 0063A5 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 0063A5 F3ECE2 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F9CCCA F3ECE2 F9CCCA F3ECE2 F9CCCA F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 0063A5 0063A5 F3ECE2 F9CCCA F3ECE2 F9CCCA F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F9CCCA F3ECE2 F9CCCA F3ECE2 F9CCCA F3ECE2 F9CCCA F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F9CCCA F3ECE2 F9CCCA F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 0063A5 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 F3ECE2 0063A5 F3ECE2 FF7245 0063A5 0063A5 0063A5 FF7245 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