#include <limits.h>
#include <stdio.h>
#include <stdlib.h>

#define STRNUM(S) strtonum(S,LLONG_MIN,LLONG_MAX,&errstr);\
if ((errstr) != NULL)\
exit(1)

int
main(int argc, char **argv) {
if (argc < 2 || argc > 4)
exit(2);

long long lo, hi, inc;
const char *errstr = NULL;

lo = (argc == 2) ? 1 : STRNUM(argv[1]);

hi = STRNUM(argv[argc - 1]);

inc = (argc < 4) ? 1 : STRNUM(argv[2]);

for (long long i = lo; i <= hi; i += inc)
printf("%lld\n", i);

exit(0);
}