Kata

Create a parser to interpret and execute the Deadfish language.

Deadfish operates on a single value in memory, which is initially set to 0.

It uses four single-character commands:

• i: Increment the value
• d: Decrement the value
• s: Square the value
• o: Output the value to a result array

All other instructions are no-ops and have no effect.

Examples

Program "iiisdoso" should return numbers [8, 64].
Program "iiisdosodddddiso" should return numbers [8, 64, 3600].