C11111333133313232233133313331333131133132313311232313331313221   >>    C1111133313331323223313331333133313113313231331123231333131322   <<    C11111333133313232233133313331333131133132313311232313331313223   >>      C11111333133313232233133313331333131133132313311232313331313222   >>