C11111211113313112113313331333133313331312322121111113313223132211   >>    C1111121111331311211331333133313331333131232212111111331322313221   <<    C11111211113313112113313331333133313331312322121111113313223132213   >>      C11111211113313112113313331333133313331312322121111113313223132212   >>