C11111211113313112113313331333133313133313232233133313232233132313223212122321   >>    C1111121111331311211331333133313331313331323223313331323223313231322321212232   <<    C11111211113313112113313331333133313133313232233133313232233132313223212122323   >>      C11111211113313112113313331333133313133313232233133313232233132313223212122322   >>