import hashlib

# Get user inputs for nonce and difficulty
nonce = input("Enter the nonce: ")
difficulty = int(input("Enter the difficulty (number of leading zeros): "))

def sha256(message):
    return hashlib.sha256(message.encode()).hexdigest()

solution = 0
while True:
    hash_result = sha256(nonce + str(solution))
    if hash_result.startswith('0' * difficulty):
        print("Solution found:", solution)
        break
    solution += 1