The Mirror Test, No Props

You've mirror-checked with a stack and with a deque. The final form: no extra containers at all — just two fingers walking toward each other. 🪞

You get a word. Compare the outermost letters, step both fingers inward, repeat. Print mirror or not a mirror.

Example:

Input: word = "rotator" Output: mirror

Comparing the outer letters and stepping inward — r=r, o=o, t=t — meets in the middle with everything matching.