input: [Char.] 6 [Pattern b s b s b s b s b] n n w w w n n n n [Char._3] I [Char._6] U [Pattern b s b s b s b s b_7] w w n n n n n n w [Char._9] + [Pattern b s b s b s b s b_10] n w n n n w n w n [Pattern b s b s b s b s b_4] 
output: n n w n n w w n n