C1111233131211111211113313331333133313232321333133313112113313112111311   >>    C111123313121111121111331333133313331323232133313331311211331311211131   <<    C1111233131211111211113313331333133313232321333133313112113313112111313   >>      C1111233131211111211113313331333133313232321333133313112113313112111312   >>