C11111211113313112113313331333133313331333132313311211113313232211211   >>    C1111121111331311211331333133313331333133313231331121111331323221121   <<    C11111211113313112113313331333133313331333132313311211113313232211213   >>      C11111211113313112113313331333133313331333132313311211113313232211212   >>