Each string is on one line. The first character on the line is the first character of the string. The last non-blank character on the line is the last character of the string. Blanks count. The ascii value of ' ' is 32, not zero. Therefore, do NOT compress out the blanks. The strings are case-sensitive. 'Science' is not equal to 'science' If you try to compute powers of 37, you will eventually exceed the memory, and the value will "wrap" giving incorrect values. Once that happens, it's too late to fix it. You must execute "% tablesize" each time you compute a power of 37. Thu Oct 30 15:27:48 PDT 2014: Change! Use tablesize 17, not 16. Fri Oct 31 15:13:06 PST 2014: Change! Input file has changed.