C1111233131211111211113313331323133313231333133313232113213331323221221   >>    C111123313121111121111331333132313331323133313331323211321333132322122   <<    C1111233131211111211113313331323133313231333133313232113213331323221223   >>      C1111233131211111211113313331323133313231333133313232113213331323221222   >>