Driver program to test above function
$ X = " ef " ; $ Y = " gh " ; echo " Minimum ▁ Cost ▁ to ▁ make ▁ two ▁ strings ▁ " . " ▁ identical ▁ is ▁ = ▁ " . findMinCost ( $ X , $ Y , 10 , 20 ) ; return 0 ; ? >