Clustering vectors with similar patterns

Say that I have many vectors, some of them are:

a: [1,2,3,4,3,2,1,0,0,0,0,0]
b: [5,5,5,5,5,10,20,30,5,10]
c: [1,2,3,2,1,0,0,0,0,0,0,0]

We can see similar patterns between vector a and c. My question is if it is possible to classify these two to the same cluster and classify b to another cluster. I rather not use algorithms like KMeans, because the values are not interesting, only the patterns do. any advice is welcome, especially solutions in Phyton. Thanks