#include <bits/stdc++.h>
#define for_(i,a,b) for (int i = (a); i < (b); i++)
#define rep_(i,a,b) for (int i = (a); i <= (b); i++)
#define per_(i,a,b) for (int i = (a); i >= (b); i--)
#define pii pair<int, int>
#define pll pair<ll, ll> 
#define fi first
#define se second
#define ll long long
#define sz(a) (int)a.size()
#define all(v) v.begin(), v.end()
#define clr(x) memset(x, 0, sizeof(x))
#define wls(v)   sort(all(v)); v.erase(unique(all(v)), v.end());
#define ull unsigned long long
#define pb push_back
#define D(x) cerr << #x << '=' << x << endl
#define outarr(a,L,R) cerr<<#a"["<<L<<".."<<R<<"]=";rep_(_x,(L),(R))cerr<<a[_x]<<" "; cerr<<endl; 
	#ifdef LOCAL
#define line cout << "--------------------------------" << endl;
#define CE cout << endl;
#define CO cout << "OK" << endl;
    #endif
#define endl '\n'
using namespace std;
bool be;clock_t startTime;
double getCurrentTime() {
	return (double)(clock() - startTime) / CLOCKS_PER_SEC;
}
const int maxn = 2e5 + 10, mod = 998244353;// mod = 1949777;
const double EPS = 1e-3;
template <typename Type>
void add(Type &x, Type y, Type Md) {
	x += y; while(x >= Md) x -= Md;
	while(x < 0) x += Md;
}
int n, m;
int a[maxn];
bool ed;
void solve() {
}
string s, t;
vector<int> v;
void solve1() {
	cin >> t;
	cin >> n;
	int bar = n / (sz(t) + sz(t) - 1);
	int cnt = 1, now = 0;
	rep_(i, 1, n) {
		cin >> a[i];
	}
	rep_(i, 1, (sz(t) + sz(t) - 1)) {
		rep_(j, (i - 1) * bar + 1, i * bar) {
			if (i & 1) {
				if (a[j] % 27 == t[i / 2] - 'a') v.pb(a[j]);
			} else if (a[j] % 27 == 26) v.pb(a[j]);
		}
	}
//	cout << "Bob" << endl;
	cout << sz(v) << endl;
	for (auto i : v) {
		cout << i << ' ';
	}
	cout << endl;
}
void solve2() {
	cin >> n;
	rep_(i, 1, n) {
		cin >> a[i];
	}
	int now = 0;
	rep_(i, 1, n) {
		if (a[i] % 27 < 26) {
			if (now == 0) {
				t.pb((a[i] % 27 + 'a'));
				now = 1;
			} 	
		} else now = 0;
	}
	cout << t << endl;
}
signed main() {
	#ifdef LOCAL
		freopen("w.in", "r", stdin);
		freopen("w.out", "w", stdout);
		startTime = clock();
//		time_t now_time = time(NULL); tm* TuT = localtime(&now_time); cout << asctime(TuT); cout << "CodeBegin:_______________________" << endl;
//		cout << "Memory footprint:" << ((&be - &ed) >> 20) <<"MB"<< endl;
//		line;
	#endif
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
  //int tt; cin >> tt; while(tt--) solve();
  cin >> s;
  if (s[0] == 'A') {
  	solve1();
  }
   else {
   	solve2();
   }
  	#ifdef LOCAL
  	cerr<<"\n\n-----------------------\nProgram done in "<<clock()-startTime<<" ms";
	#endif
 	return 0; 
}
//by whc
// check if over int , and open long long !!!
/*
Alice
aab
10
0 0 26 26 0 0 26 26 1 1

Bob
10
0 0 26 26 0 0 26 26 1 1
*/