aa

st3=>start: start foo
io5=>inputoutput: input: a, b
cond9=>condition: if a
sub13=>subroutine: print('a')
io34=>inputoutput: output:  (a + b)
e32=>end: end function return
cond18=>operation: print('b') while  i in range(3)

st3->io5
io5->cond9
cond9(yes)->sub13
sub13->io34
io34->e32
cond9(no)->cond18
cond18->io34
