/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
		String s=new String("hello world");//创建一个字符串
		int i,count=0;
		Scanner read=new Scanner(System.in);
		String c=read.nextLine().substring(0, 1);//输入一个字符
	    for(i=0;i<s.length();i++){ 
	        String d=s.substring(i,i+1);
	        if(d.equals(c)) //判断输入字符与每个字符是否相等
	            count++;
	    }
	    System.out.println(count);
	}
}

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