C11111333133313232233133313331333133313231312111133112211232223331313221   >>    C1111133313331323223313331333133313331323131211113311221123222333131322   <<    C11111333133313232233133313331333133313231312111133112211232223331313223   >>      C11111333133313232233133313331333133313231312111133112211232223331313222   >>