C11111333133313232233133313331333133112323131121211113313231231231   >>    C1111133313331323223313331333133313311232313112121111331323123123   <<    C11111333133313232233133313331333133112323131121211113313231231233   >>      C11111333133313232233133313331333133112323131121211113313231231232   >>