C1111233131211111211113313331323133313231333133311233131133132322333221   >>    C111123313121111121111331333132313331323133313331123313113313232233322   <<    C1111233131211111211113313331323133313231333133311233131133132322333223   >>      C1111233131211111211113313331323133313231333133311233131133132322333222   >>