using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using static System.Console;
using static System.Math;
using static CS_Contest.Utils;
using System.Numerics;
using System.Linq.Expressions;
//using static CS_Contest.Library;
namespace CS_Contest {
using Li = List<int>;
using LLi = List<List<int>>;
using Ll = List<long>;
internal class Program {
private static void Main(string[] args) {
var sw = new StreamWriter(OpenStandardOutput()) { AutoFlush = false };
SetOut(sw);
new Calc().Solve();
Out.Flush();
}
public class Calc {
public void Solve() {
ReadLine().Split().Select(_ => _[0]).StringJoin().WL();
}
}
}
public static class Utils {
public static int ModValue = (int)(1000000007);
public static long INF = long.MaxValue;
public static long Mod(long x) => x % ModValue;
public static long ModPow(long x, long n) {
long tmp = 1; while (n != 0) { if (n % 2 == 1) { tmp = Mod(tmp * x); } x = Mod(x * x); n /= 2; }
return tmp;
}
public static long DivMod(long x, long y) => Mod(x * ModPow(y, (long)(1e9 + 5)));
public static void WL(this object obj) => WriteLine(obj);
public static void WL(this string obj) => WriteLine(obj);
public static void WL<T>(this IEnumerable<T> list) => list.ToList().ForEach(x => x.WL());
public static int ReadInt() => int.Parse(ReadLine());
public static List<int> ReadInts(char s = ' ') => ReadLine().Split(s).Where(x => x != "").Select(int.Parse).ToList();
public static long ReadLong() => long.Parse(ReadLine());
public static List<long> ReadLongs(char s = ' ') => ReadLine().Split(s).Select(long.Parse).ToList();
public static List<int> ReadLineInt(int N)
{
var rt = new Li();
REP(N, _ => rt.Add(ReadInt()));
return rt;
}
public static void ReadMulti(out int x, out int y) {
var i = ReadInts(' ');
x = i[0]; y = i[1];
}
public static void ReadMulti(out long x, out long y) {
var i = ReadLongs(' ');
x = i[0]; y = i[1];
}
public static void ReadMulti(out int x, out int y, out int z) {
var i = ReadInts(' ');
x = i[0]; y = i[1]; z = i[2];
}
public static void ReadMulti(out int x, out int y, out int z, out int v) {
var i = ReadInts(' ');
x = i[0]; y = i[1]; z = i[2]; v = i[3];
}
public static string StringJoin<T>(this IEnumerable<T> l, string separator = "") => string.Join(separator, l);
public static long GCD(long m, long n) {
long tmp;
if (m < n) { tmp = n; n = m; m = tmp; }
while (m % n != 0) {
tmp = n;
n = m % n;
m = tmp;
}
return n;
}
public static long LCM(long m, long n) => m * (n / GCD(m, n));
public static void REP(int n, Action<int> act) {
for (var i = 0; i < n; i++) {
act(i);
}
}
public static void RREP(int n, Action<int> act) {
for (var i = n - 1; i >= 0; i--) {
act(i);
}
}
public static List<T> OrderByToList<T>(this IEnumerable<T> l) => l.OrderBy(x => x).ToList();
public static int ManhattanDistance(int x1, int y1, int x2, int y2) => Abs(x2 - x1) + Abs(y2 - y1);
public struct IndexT<T> {
public T Value { get; set; }
public int Index { get; set; }
public IndexT(T v, int i) {
Value = v; Index = i;
}
public override string ToString() {
return Value + " " + Index;
}
}
public static IEnumerable<IndexT<T>> ToIndexEnumerable<T>(this IEnumerable<T> list) => list.Select((x, i) => new IndexT<T>(x, i));
public static Queue<T> ToQueue<T>(this IEnumerable<T> iEnumerable) {
var rt = new Queue<T>();
foreach (var item in iEnumerable) {
rt.Enqueue(item);
}
return rt;
}
public static IndexT<T> IndexOf<T>(this IEnumerable<T> ie, Func<IndexT<T>, IndexT<T>, IndexT<T>> func) =>
ie.ToIndexEnumerable().Aggregate(func);
public static Tuple<TKey, TSource> ToTuple<TKey, TSource>(this KeyValuePair<TKey, TSource> kvp) => new Tuple<TKey, TSource>(kvp.Key, kvp.Value);
public static IEnumerable<Tuple<TKey, TSource>> ToTupleList<TKey, TSource>(this Dictionary<TKey, TSource> d) => d.Select(_ => _.ToTuple());
public static IEnumerable<T> When<T>(this IEnumerable<T> iEnumerable, Func<T, bool> condition, Func<T,T> filterFunc) {
var rt = iEnumerable.ToArray();
var index = 0;
foreach (var item in iEnumerable) {
rt[index] = condition(item) ? filterFunc(item) : item;
index++;
}
return rt;
}
public static T[] Range<T>(int range,Func<int,T> func) {
var rt = new T[range];
for (var i = 0; i < range; i++) rt[i] = func(i);
return rt;
}
public static void Swap<T>(ref T x,ref T y) {
var tmp = x;
x = y;
y = tmp;
}
public static int Count<T>(this IEnumerable<T> l, T target) => l.Count(x => x.Equals(target));
}
}