How Do You Find the Effective Resistance Between Points A and B?

[zorro]

Homework Statement

Find the effective resistance between the points A and B.

The Attempt at a Solution

The circuit is a hexagon as shown in the image.
I used star-delta method to convert upper and lower deltas respectively into Ys and then did some simplification. However, I'm stuck up at one place. Refer the two figures.
Please help.

 

[hikaru1221]

I think you over-think it. Notice that the circuit is shorted at 3 points M, N and P. Simplify the circuit and it comes down to a simple problem

 

[zorro]

Oh! yeaah...it is a very simple problem
Thanks!