import time


def permute(picked: str, remaining: str):
    if remaining == "" :
        print(picked + remaining + ", ", end="")

    else:
        for i in range(len(remaining)):
            pick = remaining[i]
            front = remaining[:i]
            back = remaining[i+1:]
            permute(picked + pick, front + back)

def main():
    start = time.time()
    permute("","abcdefghijk")
    end = time.time()
    print(end - start)
    #"abcdefghijk" takes 85 sec

main()