C1111233131211111211113313331333133313232321333133313331333131121212133121   >>    C111123313121111121111331333133313331323232133313331333133313112121213312   <<    C1111233131211111211113313331333133313232321333133313331333131121212133123   >>      C1111233131211111211113313331333133313232321333133313331333131121212133122   >>