using System;

public class Program

{

public static void Main(string[] args)

{

int i = 0;

int n = int.Parse(Console.ReadLine());

string[] s = new string[50];

for (i = 0; i < n; i++)

s[i] = Console.ReadLine();

s[i] = "\0";

int sl = UserProgramCode.shortestWordLength(s);

Console.WriteLine(sl);

Console.ReadLine();

}

}

public class UserProgramCode

{

public static int shortestWordLength(string[] s)

{

int sl =s[0].Length;

for (int i = 1; s[i]!="\0"; i++)

{

if (s[i].Length < sl)

sl = s[i].Length;

}

return sl;

}

​