C111123313331323113313331333133313331323133112113313232213123221   >>    C11112331333132311331333133313331333132313311211331323221312322   <<    C111123313331323113313331333133313331323133112113313232213123223   >>      C111123313331323113313331333133313331323133112113313232213123222   >>