C11111211113313112113313331333133313331333132212111133133313331322121111123321   >>    C1111121111331311211331333133313331333133313221211113313331333132212111112332   <<    C11111211113313112113313331333133313331333132212111133133313331322121111123323   >>      C11111211113313112113313331333133313331333132212111133133313331322121111123322   >>