C1111233131211111211113313331333133313331333133313331333133313233221311   >>    C111123313121111121111331333133313331333133313331333133313331323322131   <<    C1111233131211111211113313331333133313331333133313331333133313233221313   >>      C1111233131211111211113313331333133313331333133313331333133313233221312   >>