#include <bits/stdc++.h>

using namespace std;

#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second

template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> pip;

const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS  = 1e-10;

int main() {
	double n;
	while (cin >> n, n >= 0) {
		n *= 16;
		ll a = n;
		
		if (a < n) { puts("NA"); continue; }
		
		int ans[12] = {};
		REP(i, 12) {
			ans[11 - i] = a % 2;
			a /= 2;
		}
		
		if (a > 0) puts("NA");
		else {
			REP(i, 8) putchar('0' + ans[i]);
			putchar('.');
			FOR(i, 8, 12) putchar('0' + ans[i]);
			puts("");
		}
	}
	return 0;
}