C1111233131211111211113313331333131133132313132313331323222233221   >>    C111123313121111121111331333133313113313231313231333132322223322   <<    C1111233131211111211113313331333131133132313132313331323222233223   >>      C1111233131211111211113313331333131133132313132313331323222233222   >>