Given a String, return the count of the number of times that a substring length 2 appears in the string and also
as the last 2 chars of the string.
So "hixxxhi" yields 1.
Don't count the last substring.
For this problem we're expecting only a method.
Don't define a class, include modifiers like static or public, add import statements, or add code outside the method declaration.
intlast2(Stringinput) {
return0; // You may need to remove this starter code