C11111211113313112113313331333133313331333131211113313331323212211   >>    C1111121111331311211331333133313331333133313121111331333132321221   <<    C11111211113313112113313331333133313331333131211113313331323212213   >>      C11111211113313112113313331333133313331333131211113313331323212212   >>