Hi guys,

A friend of mine just popped into my house yesterday and gave me a piece of paper with a privkey of BTC wallet. The thing is that it is old-washed paper and I can read only the first 9 symbols of this string. Is it possible to retrieve his Bitcoin with only that fraction of a private key (the balance is 1.09BTC)? How long would it take to brute force the rest of the private key?