using System;

public class Test
{
	public static void Main()
	{
		bool isProgression = isTrue(int.Parse(Console.ReadLine()));
		if (true == isProgression)
		{
			Console.WriteLine("True");
		}
		else
		{
			Console.WriteLine("False");
		}
	}
	public static bool isTrue(int number)
	{
		bool isProgression = false;
		string strNumber = number.ToString();
		for(int i = 0; i < strNumber.Length - 1; i++)
		{
			if((strNumber[i] - '0') < (strNumber[i + 1] - '0'))
			{
				isProgression = true;
			}
			else
			{
				isProgression = false;
				break;
			}
			if(false == isProgression){
				break;
			}
		}
		return isProgression;
	}
}