seq=  7#[3,1,2,3,1,2] 9#[4,2,3,4,2,3] 10#[3,1,2,3,1,2] 13#[5,2,3,5,2,3] 15#[3,2,4,1,2,3,1,4] 15#[2,3,4,2,5,4,3,5] 15#[5,1,4,2,3,5,2,4,1,3] 20#[5,3,4,2,3,1,2,5,1,4]