C11111211113313112113313331333133313231323223313231333132321211   >>    C1111121111331311211331333133313331323132322331323133313232121   <<    C11111211113313112113313331333133313231323223313231333132321213   >>      C11111211113313112113313331333133313231323223313231333132321212   >>