how to draw these 2 python code flow chart?

1.def main():

nric = input("\tNRIC(in 12-digits form without hyphen):")

checked_nric = chk_int(nric)

def chk_int(nric):

while len(nric) != 12 or (not nric.isdigit()):

print("Invalid")

nric = input("\tNRIC(in 12-digits form without hyphen):")

nric = int(nric)

main()

2.def main():

pp = input("\tPassport number:")

checked_pp = chk_str(pp)

def chk_str(pp):

while True:

try:

pp = str(pp)

break

except ValueError:

print("Invalid")

pp = input("\tPassport number:")

return pp

main()