using System;
using System.Diagnostics;
using System.Collections.Generic;
using System.Linq;
using Enu = System.Linq.Enumerable;
class Solution {
void calc() {
string s = Console.ReadLine();
int n = ri();
int i = (n - 1) / 5, j = (n - 1) % 5;
Console.WriteLine("" + s[i] + s[j]);
}
static void Main(string[] args) {
new Solution().calc();
}
#region
static int ri() { return int.Parse(Console.ReadLine()); }
static int[] ria(int n) {
if(n <= 0) { Console.ReadLine(); return new int[0]; }
else return Console.ReadLine().Trim().Split(' ').Select(int.Parse).ToArray();
}
static void rio(out int p1) { p1 = ri(); }
static void rio(out int p1, out int p2) { var r = ria(2); p1 = r[0]; p2 = r[1]; }
static void rio(out int p1, out int p2, out int p3) { var r = ria(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; }
static void rio(out int p1, out int p2, out int p3, out int p4) { var r = ria(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; }
static void rio(out int p1, out int p2, out int p3, out int p4, out int p5) { var r = ria(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; }
static long rl() { return long.Parse(Console.ReadLine()); }
static long[] rla(int n) {
if(n <= 0) { Console.ReadLine(); return new long[0]; }
else return Console.ReadLine().Trim().Split(' ').Select(long.Parse).ToArray();
}
static void rlo(out long p1) { p1 = rl(); }
static void rlo(out long p1, out long p2) { var r = rla(2); p1 = r[0]; p2 = r[1]; }
static void rlo(out long p1, out long p2, out long p3) { var r = rla(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; }
static void rlo(out long p1, out long p2, out long p3, out long p4) { var r = rla(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; }
static void rlo(out long p1, out long p2, out long p3, out long p4, out long p5) { var r = rla(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; }
static double rd() { return double.Parse(Console.ReadLine()); }
static double[] rda(int n) {
if(n <= 0) { Console.ReadLine(); return new double[0]; }
else return Console.ReadLine().Trim().Split(' ').Select(double.Parse).ToArray();
}
static void rdo(out double p1) { p1 = rd(); }
static void rdo(out double p1, out double p2) { var r = rda(2); p1 = r[0]; p2 = r[1]; }
static void rdo(out double p1, out double p2, out double p3) { var r = rda(3); p1 = r[0]; p2 = r[1]; p3 = r[2]; }
static void rdo(out double p1, out double p2, out double p3, out double p4) { var r = rda(4); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; }
static void rdo(out double p1, out double p2, out double p3, out double p4, out double p5) { var r = rda(5); p1 = r[0]; p2 = r[1]; p3 = r[2]; p4 = r[3]; p5 = r[4]; }
static void swap<T>(ref T x, ref T y) { T temp = x; x = y; y = temp; }
static void wa1<T>(T[] a) { Debug.WriteLine(string.Join(" ", a)); }
static void wa2<T>(T[][] a) {
foreach(var row in a) {
Debug.WriteLine(String.Join(" ", row));
}
}
[DebuggerDisplay("{x} , {y}")]
class point<T> {
public T x, y;
public point(T x, T y) {
this.x = x; this.y = y;
}
}
#endregion
}
static class Extention {
public static T[][] ToJagArray<T>(this T[,] a) {
int n = a.GetLength(0), m = a.GetLength(1);
var ret = new T[n][];
for(int i = 0; i < n; i++) {
ret[i] = new T[m];
for(int j = 0; j < m; j++) {
ret[i][j] = a[i, j];
}
}
return ret;
}
public static bool InRange<T>(this T[,] a, int i, int j) {
int n = a.GetLength(0), m = a.GetLength(1);
return 0 <= i && i < n && 0 <= j && j < m;
}
}