C1111233131211111211113313331333131211111132233133313331311211322131   >>    C111123313121111121111331333133313121111113223313331333131121132213   <<    C1111233131211111211113313331333131211111132233133313331311211322133   >>      C1111233131211111211113313331333131211111132233133313331311211322132   >>