#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <string.h>
using namespace std;

int Check(char chuoi[500])
{
	int dodai = strlen(chuoi) - 1;
	int k = 1,x;
	for (int i = 65; i <= 90; i++)
	{
		for (int j = 0; j <= dodai; j++)
		{
			if ((int)chuoi[j] != i && (int)chuoi[j] != i + 32)
			{
				k = 0;
			}
			else
			{
				k = 1;
				break;
			}
		}
		if (k != 1)
			return 0;
	}
	return 1;
}
int main()
{
	char chuoi[500];
	cin.getline(chuoi, 500);
	if (Check(chuoi))
		cout << "True";
	else cout << "False";
	return 1;
}