Problem: Replace exercise 2

Code: Replace+exercise+2/tails_1644213543

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)

^ (pow) 
    $ (= fstInt) 
    -4 (integer)