C1111233131211111211113313231333133313331323331333131211113313331333232211   >>    C111123313121111121111331323133313331333132333133313121111331333133323221   <<    C1111233131211111211113313231333133313331323331333131211113313331333232213   >>      C1111233131211111211113313231333133313331323331333131211113313331333232212   >>