从字母表中枚举第K个字符串

def enumerate_string(k, current_str):
    if k == 0:
        return current_str
    
    result = ""
    for letter in range(ord('a'), ord('z')+1):
        result += enumerate_string(k-1, current_str + chr(letter))
        if len(result) >= k:
            break
    
    return result

k = 10
result = enumerate_string(k, "")
print(f"The {k}th string in the alphabet is: {result}")