C11111211113313112113313331333133313231323223313231333131321221   >>    C1111121111331311211331333133313331323132322331323133313132122   <<    C11111211113313112113313331333133313231323223313231333131321223   >>      C11111211113313112113313331333133313231323223313231333131321222   >>