Baliktarin ang isang salita gamit ang stack. Halimbawa: "CodeNova" → "avoNedoC".
INPUT: CodeNova
EXPECTED OUTPUT: avoNedoC
INPUT: Hello, World!
EXPECTED OUTPUT: !dlroW ,olleH
INPUT: I Love CodeNova!
EXPECTED OUTPUT: !avoNedoC evoL I
INPUT: I want to learn Python!
EXPECTED OUTPUT: !nohtyP nrael ot tnaw I
INPUT: Hackathon :)
EXPECTED OUTPUT: ): nohtakcaH