C11111211113313112113313331333132313331322121111133313331333133313311211311   >>    C1111121111331311211331333133313231333132212111113331333133313331331121131   <<    C11111211113313112113313331333132313331322121111133313331333133313311211313   >>      C11111211113313112113313331333132313331322121111133313331333133313311211312   >>