#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 10010, BLO = 8;

namespace ENCODE {
	int n, a[N];
	string s;
	void MAIN() {
		cin >> s;
		cin >> n;
		// cerr << s << "\n";
		for(int i = 1; i <= n; i++) cin >> a[i];
		vector<int> ans;
		int cur = 0;
		for(int i = 1; i <= n; i++) {
			if(a[i] % 27 != s[cur] - 'a') continue;
			// cerr << a[i] % 27 << " ";
			ans.push_back(a[i]);
			if(ans.size() / BLO < 2 * cur + 1) continue;
			cur++;
			if(cur == s.size()) break;
			for(; i <= n; i++) {
				if(a[i] % 27 != 26) continue;
				ans.push_back(a[i]);
				if(ans.size() / BLO < 2 * cur) continue;
				break;
			}
		}
		cout << ans.size() << "\n";
		for(auto v : ans) cout << v << " ";
	}
}
namespace DECODE {
	int n, a[N];
	void MAIN() {
		cin >> n;
		for(int i = 1; i <= n; i++) cin >> a[i];
		int pre = -1;
		for(int i = 1; i <= n; i++) {
			int t = a[i] % 27;
			if(t == pre) continue;
			pre = t;
			if(pre < 26) cout << (char)(pre + 'a');
		}
		cout << "\n";
	}
}
int main() {
	ios::sync_with_stdio(0); cin.tie(nullptr);
	// freopen("D.in", "r", stdin);
	// freopen("D.out", "w", stdout);
	string op = "";
	cin >> op;
	// freopen("D.out", "r", stdin);
	if(op == "Alisa") {
		ENCODE::MAIN();
	}
	else {
		DECODE::MAIN();
	}
	return 0;
}