Problem: Code Festival A If you cannot solve this

Code: Code+Festival+A+If+you+cannot+solve+this/tails_1642142485

Nibbles version: 0.2 | 0.21 | 0.22 | 0.23 | 0.24 | 0.25 | 1.00

Format: Compact | Simple | +Type | Table | JSON | .nbl (DeBruijn) | .nbl (names)

? (if/else) 
    - (subtract) 
        * (multiply) 
            * (multiply) 
                = (subscript (wrapped)) 
                    2 (integer) 
                    _ (= ints) 
                ~ (auto = 2) 
            $ (= fstInt) 
        + (sum) 
            >> (tail) 
                _ (= ints) 
    "Pass" (string) <--arg( A ) 
    "Fail" (string)