Level 38
You don't need a Bitcoin miner to proof that you can do some work.
Seal the block by finding a nonce that (combined with the data) will return a sha1 hash with 7 leading zeroes
sha1 = ( "70d14e25b9 gives 43 0xfcoins to" + "e72f0554c6" + nonce)
Example:
nonce = "dnt28wclnx"
sha1("string1"+"string2"+nonce) -> Results in sha1 hash 000000140e9731bbf369d8cbc4f7919961020793 so dnt28wclnx would be a solution if we were looking for 6 leading zeroes
Solution: