import random

# Random Greek letter
result_str = ''.join((random.choice('ΑΒΓΔΕΖΗΘΙΚΛΜΝΞΟΠΡΣΤΥΦΧΨΩ') for i in range(1)))
print(result_str)

# Python 3 program to print all
# possible strings of length k
     
# The method that prints all
# possible strings of length k.
# It is mainly a wrapper over
# recursive function printAllKLengthRec()
def printAllKLength(set, k):
 
    n = len(set)
    printAllKLengthRec(set, "", n, k)
 
# The main recursive method
# to print all possible
# strings of length k
def printAllKLengthRec(set, prefix, n, k):
     
    # Base case: k is 0,
    # print prefix
    if (k == 0) :
        print(prefix)
        return
 
    # One by one add all characters
    # from set and recursively
    # call for k equals to k-1
    for i in range(n):
 
        # Next character of input added
        newPrefix = prefix + set[i]
         
        # k is decreased, because
        # we have added a new character
        printAllKLengthRec(set, newPrefix, n, k - 1)
 
# Driver Code
if __name__ == "__main__":
     
    print("First Test")
    set1 = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z']
    k = 3
    printAllKLength(set1, k)
     
    print("\nSecond Test")
    set2 = ['a', 'b', 'c', 'd']
    k = 1
    printAllKLength(set2, k)
 
# This code is contributed
# by ChitraNayal

import random
chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
nums = '0123456789'
letters = ''
numbers = ''
quantity = int(input('How many plates'))
for c in range(3):
    letters += random.choice(chars)
    
for c in range(3):
    numbers += random.choice(nums)

print('Your plate is', letters, numbers)

from random import choices, randint

LETTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

def gen_number_plate():
    letters = ''.join(choices(LETTERS, k=3))
    numbers = randint(1, 999)
    return f'{letters}-{numbers:03d}'

print(gen_number_plate())

def letter_combinations(digits):
    if digits == "":
        return []
    string_maps = {
        "1": "abc",
        "2": "def",
        "3": "ghi",
        "4": "jkl",
        "5": "mno",
        "6": "pqrs",
        "7": "tuv",
        "8": "wxy",
        "9": "z"
    }
    result = [""]
    for num in digits:
        temp = []
        for an in result:
            for char in string_maps[num]:
                temp.append(an + char)
        result = temp
    return result

digit_string = "47"
print(letter_combinations(digit_string))
digit_string = "29"
print(letter_combinations(digit_string))