View difference between Paste ID: 2cBiWzut and 8CREQQgX

     let y1 = [1; 2; 3; 4; 5]
     let y2 = ['a'; 'b'; 'c'; 'd'; 'e']
     let rec Comb = function
-        a1::b1 a2::b2-> a1::b1::Comb(b1 b2)
+        a1::b1 a2::b2-> a1::a2::Comb(b1 b2)
     printfn "%A" (Comb y1 y2)