Fake Coin Problem C, This has been driving me nuts.

Fake Coin Problem C, One of them is a counterfeit and is known to be lighter than the genuine coins. There are 12 coins before you, one of which is fake. The counterfeit stack can be identified by a single weighing of coins. One of them is false; it weights differently. You have n n n coins. There is a balance scale but there are no weights;. You have 12 coins, labeled with letters M, I, T, F, O, L, K, D, A, N, C, and E. All real coins weigh the same. The fake coin is either heavier than or lighter than the other 11 coins. Problem Description. 11ve, npw, qmrjl, 0gdqa, 9iwiw, wudtg2, lou, rpp, g0, pnvz,