C31111132133313133313231333131112111113233313232232132313221221   >>    C3111113213331313331323133313111211111323331323223213231322122   <<    C31111132133313133313231333131112111113233313232232132313221223   >>      C31111132133313133313231333131112111113233313232232132313221222   >>