C11111211113313112113313331333133313331333131211113313331323132233132311321   >>    C1111121111331311211331333133313331333133313121111331333132313223313231132   <<    C11111211113313112113313331333133313331333131211113313331323132233132311323   >>      C11111211113313112113313331333133313331333131211113313331323132233132311322   >>