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#include <stdio.h>
#include <string.h>

#define IN  1
#define OUT 0
#define MAX 1024

void header(FILE *fp);
void body(FILE *fp);

char line[MAX];
int state = 0;

int main(int argc, char *argv[]) {
 (argc == 2) && (strcmp(argv[1], "-b") == 0) ?
  body(stdin) : header(stdin);

 return 0;
}

void header(FILE *fp) {
 while((fgets(line, MAX, fp)) != NULL) {
  if(strstr(line, "From ")) (state = IN);
   (state == IN && strlen(line) > 1) ? printf("%s", line) : (state = OUT); 
 } 
}

void body(FILE *fp) {
 while((fgets(line, MAX, fp)) != NULL) {
  if(strstr(line, "From ")) (state = OUT);
  if(state == OUT && strlen(line) < 2) (state = IN);
  if(state == IN) printf("%s", line);
 }
}

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