C++ :

#include <cstdio>
int main(){
    int n;
    if(scanf("%d", &n) != 1) return 0;
    int cnt = 0;
    for(int i = 1; i <= n; i++){
        int ok = (i % 7 == 0);
        for(int x = i; x > 0 && !ok; x /= 10) if(x % 10 == 7) ok = 1;
        if(ok){
            if(cnt > 0) putchar(cnt % 10 == 0 ? '\n' : ' ');
            printf("%d", i);
            cnt++;
        }
    }
    if(cnt == 0) puts("NO"); else putchar('\n');
    return 0;
}