C312312111111331312111133133313331333133322331323133313331323133313211232211   >>    C31231211111133131211113313331333133313332233132313331333132313331321123221   <<    C312312111111331312111133133313331333133322331323133313331323133313211232213   >>      C312312111111331312111133133313331333133322331323133313331323133313211232212   >>