C11111211113313112113313331333133313331333211321133132313232212111   >>    C1111121111331311211331333133313331333133321132113313231323221211   <<    C11111211113313112113313331333133313331333211321133132313232212113   >>      C11111211113313112113313331333133313331333211321133132313232212112   >>