C1111233131211111211113313331333133313331122212111111331322233321   >>    C111123313121111121111331333133313331333112221211111133132223332   <<    C1111233131211111211113313331333133313331122212111111331322233323   >>      C1111233131211111211113313331333133313331122212111111331322233322   >>