C22212323232133313113313331333133313231333112113222121232223111   >>    C2221232323213331311331333133313331323133311211322212123222311   <<    C22212323232133313113313331333133313231333112113222121232223113   >>      C22212323232133313113313331333133313231333112113222121232223112   >>