C1111133313331323223313331333133313113313231333132212111113232121211   >>    C111113331333132322331333133313331311331323133313221211111323212121   <<    C1111133313331323223313331333133313113313231333132212111113232121213   >>      C1111133313331323223313331333133313113313231333132212111113232121212   >>