C111123313331323113313331333133313331323133112113313232233132313331311312212221   >>    C11112331333132311331333133313331333132313311211331323223313231333131131221222   <<    C111123313331323113313331333133313331323133112113313232233132313331311312212223   >>      C111123313331323113313331333133313331323133112113313232233132313331311312212222   >>