Excel If then else support

Hi! 

Is it possible to make an 'if then else' formula what is true for 2 (out of 7! possibilities)? In my file i use text in cells instead of numbres. But i think it should not make any difference

 

Small example: 

A and B can be 1 till 9

Rule: Only the combinations 'A=1&B=1 or A=2&B=2 or A=1&B=2 or A=2&B=1 are true. 

 

I think the formula should be: =if(and(A1=1;B1=1)*or(and(A1=2;B1=2));true;false) 

also i tried: 
=if(and(A1=1*or(A1=2);B1=1*or(B1=2))

 

But for some reason it isn't working :( 

 

Please, could someone help me? 

 

Kind regards, 

Jantine