C11111333133313232233133313331333131133132313331312111113123321   >>    C1111133313331323223313331333133313113313231333131211111312332   <<    C11111333133313232233133313331333131133132313331312111113123323   >>      C11111333133313232233133313331333131133132313331312111113123322   >>