"If the strings are different lengths the function should interlace them until each string runs out, continuing to add characters from the remaining strings."
^The instructions say the above. Consequently, for this test case:

["AY2e7tm4xw", "3Lp/.51wbC(", "(C@;", "y56@l", "wzA", "h8gBPZX94:,a;", "Caq", "MOJ", "RYP", "/O/v<+uT/YNX:Xv", "G7", "fTryDWUha?fbk", "K,Ir:@D", "l.", ".FHyK.o"]
the output shouldn't be "A3(ywhCMR/GfKl." right? It should continue until each string is empty...at least that's my understanding