C11111211113313112113313331333131211113313331333132212111133133313331311212221   >>    C1111121111331311211331333133313121111331333133313221211113313331333131121222   <<    C11111211113313112113313331333131211113313331333132212111133133313331311212223   >>      C11111211113313112113313331333131211113313331333132212111133133313331311212222   >>