What's that word that precedes "Kantan"

[bunalz3]

In a battle-oriented anime/game, when a character (not a polite one) did a task or several tasks, and found them to be very easy, he (or she) often makes a remark (kind of boasting, actually) which can be translated as "that was a cinch!", or "no sweat!", etc:

"______ kantan desu ne!"

(I couldn't recall the exact sound of it, but it's something like "raksho")

[Ongakuka]

楽勝

らくしょう

Easy win