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#include <stdio.h>
#define T_INIT 0100
#define T_STOP 0111
long charin; /* number of input character */
main(argc, argv)
char **argv;
{
int npages = 0;
register int c;
while((c=getchar()) != EOF) {
charin++;
c &= 0377;
if(c != T_INIT)
continue;
else {
c=getchar();
c &= 0377;
if(c == T_STOP) {
npages++;
charin++;
}
}
}
if(charin<5) {
fprintf(stderr, "%s: no input\n", argv[0]);
exit(1);
}
printf("%d\n", npages);
}
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