C11111211113313112113313331333133313331333131211113313331323223313231323111   >>    C1111121111331311211331333133313331333133313121111331333132322331323132311   <<    C11111211113313112113313331333133313331333131211113313331323223313231323113   >>      C11111211113313112113313331333133313331333131211113313331323223313231323112   >>