C1111233131211111211113313331333133313331122212111111331323222121   >>    C111123313121111121111331333133313331333112221211111133132322212   <<    C1111233131211111211113313331333133313331122212111111331323222123   >>      C1111233131211111211113313331333133313331122212111111331323222122   >>