C1111233131211111211113313331333131211111132233133313331323131121221221   >>    C111123313121111121111331333133313121111113223313331333132313112122122   <<    C1111233131211111211113313331333131211111132233133313331323131121221223   >>      C1111233131211111211113313331333131211111132233133313331323131121221222   >>