C111123313331323113313331333133313331323133112323331123231311211   >>    C11112331333132311331333133313331333132313311232333112323131121   <<    C111123313331323113313331333133313331323133112323331123231311213   >>      C111123313331323113313331333133313331323133112323331123231311212   >>