How to find axiom of this picture

[DerbyHarrington]

Hey folks. I'm wondering if anyone can help me to find axioms of these pictures somehow

[ndc85430]

Define "axiom" in this context. Also, what have you tried, or looked up or anything? We aren't here to do the work for you.

[DerbyHarrington]

Hello, thank you for your reply.
sorry about that. I forgot to show what I've worked. So this is what I've worked :

import turtle

D = 90
L = 10

def iterate(axiom, num=0, initator='F'):
    """
    Compute turtle rule string by iterating on an axiom
    """

    def translate(current, axiom):
        """
        Translate all the "F" with the axiom for current string
        """
        result = ''
        consts = {'+', '-', '[', ']'}
        for c in current:
            if c in consts:
                result += c
                continue
            if c == 'F':
                result += axiom
        return result

    # Set initator
    result = initator
    for i in range(0, num):
        # For ever iteration, translate the rule string
        result = translate(result, axiom)
    return result

def draw(axiom, d=D, l=L):
    """
    Use turtle to draw the L-System
    """
    stack  = []                 # For tracking turtle positions
    screen = turtle.Screen()
    screen.bgcolor('black')
    screen.setup(width=1000,height=1000,startx = 500,starty=0)
    alex   = turtle.Turtle()
    alex.pencolor('yellow')
    alex.up()
    alex.left(90)   
    alex.setposition(0,-250)
    alex.down()
    alex.hideturtle()      
    alex.speed(1)               
            
    

    for i in range(len(axiom)):
        c = axiom[i]

        if c == 'F':
            alex.forward(l)

        if c == '-':
            alex.left(d)

        if c == '+':
            alex.right(d)

        if c == '[':
            stack.append((alex.heading(), alex.pos()))
            

        if c == ']':
            heading, position = stack.pop()
            alex.penup()
            alex.goto(position)
            alex.setheading(heading)
            alex.pendown()

if __name__ == '__main__':
        axiom = "FF-[-F+F+F]+[+F-F-F]"
        axiom = iterate(axiom, 5, "F")
        draw(axiom, 25, 13)

So using the FF-[-F+F+F]+[+F-F-F] as the axiom and using:

[python]
for i in range(len(axiom)):
c = axiom[i]

if c == 'F':
alex.forward(l)

if c == '-':
alex.left(d)

if c == '+':
alex.right(d)

if c == '[':
stack.append((alex.heading(), alex.pos()))


if c == ']':
heading, position = stack.pop()
alex.penup()
alex.goto(position)
alex.setheading(heading)
alex.pendown()
[\pyhton]
as the rule will produce this image
https://mail.google.com/mail/u/0?ui=2&ik..._k7szjeoz1

So now my lecturer told me to find the axiom of those pictures by applying the same rule.

Thanks you. Sorry for my bad english.