C190 The Needle Hole

"Do you know the password?" All eyes were on the student.

Feeling the weight of the stares, the middle schooler grew tense. "My teacher once explained permutations and combinations. We can try these five numbers up to 120 times to get it right."

"120 times! Then get to it, quickly!" The man in the suit, sensing a glimmer of hope, urged him on