It Isn't Etaoin Shrdlu; It's Etaoni Rshdlc

[caveman]

I just came across this:
http://jmq.sagepub.com/content/43/4/761.extract
and did not bother to confirm this 1966 paper...

[Matt Mahoney]

ETAONI HSRDLU WMCGFYBPVKXJQZ in calgary/book1
ETAONI HSRDLU MWCFGYPBVKXJQZ in silesia/dickens
EANITO RSLCDU MPHGFBYVWKXJZQ in maxcomp/world95.txt
ETHAON ISRDLU FMWYGCBPVKJZXQ in cantrbry_large/bible.txt
ETAION RSLHCD MUPGFBYWVKQXJZ in enwik8
ETAION RSLHDC MUPGFBYWVKQXJZ in enwik9
ETASIN ORLDCP UHMGFBWYKVXJQZ in Reuters 21578 corpus

// Print alphabet by decreasing frequency from file name args
// Public domain.

#include <stdio.h>
int main(int argc, char** argv) {
  int t[26]={0}, c, n=0;
  char buf[4096];
  for (int i=1; i<argc; ++i) {
    FILE* in=fopen(argv[i], "rb");
    while (in && (n=fread(buf, 1, 4096, in))>0) {
      for (int j=0; j<n; ++j) {
        c=buf[j];
        if (c>='a' && c<='z') ++t[c-'a'];
        if (c>='A' && c<='Z') ++t[c-'A'];
      }
    }
    if (in) fclose(in);
  }
  n=0;
  for (int i=0; i<26; ++i) {
    int b=0;
    for (int j=1; j<26; ++j)
      if (t[j]>t[b]) b=j;
    printf("%c", b+'A');
    if (i==5 || i==11) printf(" ");
    n+=t[b];
    t[b]=-1;
  }
  printf(" n=%d\n", n);
  return 0;
}