I tried to make a random password generator.

#Password Generator Project
import random
letters = ['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', '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']
numbers = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
symbols = ['!', '#', '$', '%', '&', '(', ')', '*', '+']

print("Welcome to the PyPassword Generator!")
nr_letters= int(input("How many letters would you like in your password?n")) 
nr_symbols = int(input(f"How many symbols would you like?n"))
nr_numbers = int(input(f"How many numbers would you like?n"))

#Eazy Level - Order not randomised:
#e.g. 4 letter, 2 symbol, 2 number = JduE&!91

letter_list=[]
symbol_list=[]
number_list=[]
for let in range(0,nr_letters):
  letter_list.append(letters[random.randint(0,len(letters)-1)])
for sym in range(0,nr_symbols):
  symbol_list.append(symbols[random.randint(0,len(symbols)-1)])
for num in range(0,nr_numbers):
  number_list.append(numbers[random.randint(0,len(numbers)-1)])


print_letter=""
print_symbol=""
print_number=""

for n in range(0,nr_letters):
  print_letter += letter_list[n]
for m in range(0,nr_symbols):  
  print_symbol += str(symbol_list[n])
for l in range(0,nr_numbers):
  print_number += str(number_list[n])


print_out=print_letter+print_symbol+print_number
print(print_out)

For input,
2,3,3 works,
1,1,1 works,
but 2,1,2 or 2,3,1 doesn’t work..

When there is 1 for input it causes problem