#include "bits/stdc++.h"
using namespace std;

#define int long long
#define DBG 1
#define dump(o) if(DBG){cerr<<#o<<" "<<o<<endl;}
#define dumpc(o) if(DBG){cerr<<#o; for(auto &e:(o))cerr<<" "<<e;cerr<<endl;}
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define rrep(i,a,b) for(int i=(b)-1;i>=(a);i--)
#define each(it,c) for(auto it=(c).begin();it!=(c).end();it++)
#define all(c) c.begin(),c.end()
const int INF = sizeof(int) == sizeof(long long) ? 0x3f3f3f3f3f3f3f3fLL : 0x3f3f3f3f;
const int MOD = (int)(1e9 + 7);

signed main() {
	for (string s; cin >> s&&s != "#";) {
		string t = "";
		int a = -1;
		int n = 0;
		rrep(i, 0, s.size()) {
			if (s[i] == 'n') {
				if (a == -1)a = 0;
				else {
					a *= 2;
					a -= 90;
				}
				n++;
			}
			else if (s[i] == 'w') {
				if (a == -1)a = 90;
				else {
					a *= 2;
					a += 90;
				}
				n++;
			}
		}
		if (n <= 2)cout << a / n << endl;
		else cout << a / 2 << "/" << pow(2, n - 2) << endl;
	}
	return 0;
}