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Portable Network Graphic  |  1995-04-05  |  5.2 KB  |  527x331  |  1-bit (2 colors)
   ocr: while ((n= read(in fd, mybuf, BUFSIZE) for (p= mybuf; p-mybuf A n;++p) if 1 islower(*p)) p= toupper(*p); else if (isupper("p)) p= tolower(*p); write (out fd, mybuf, n); close(in fd); close(out fd);