C :

#include<stdio.h>
int main()
{
    char c;
    int cnum=0,clet=0,cspace=0,coth=0;
    while(scanf("%c",&c)!=EOF&&c!='\n')
    {
      if((c>='a'&&c<='z')||(c>='A'&&c<='Z'))
      {
        clet++;
      }
      else
      {
          if(c>='0'&&c<='9')
          {
           cnum++;
          }
          else
          {
           if(c==' ')
           {
             cspace++;
           }
           else
           {
               coth++;
           }
          }
          }
    }
    printf("%d %d %d %d\n",clet,cnum,cspace,coth);
  
}

C++ :

#include"stdio.h"  
main()  
{char c;int i=0,j=0,k=0,l=0;  
while((c=getchar())!='\n')  
{if(c>=65&&c<=90||c>=97&&c<=122) i++;  
else if(c>=48&&c<=57) j++;  
else if(c==32) k++;  
else l++;}  
printf("%d %d %d %d",i,j,k,l);  
}

Java :

import java.util.Scanner;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input  = new Scanner(System.in);
		
		String s = input.nextLine();
		int nSum = 0,cSum = 0,sSum = 0,oSum = 0;
		for(int i = 0; i < s.length(); i ++){
			if(s.charAt(i) > 47 && s.charAt(i) < 58){
				nSum ++;
			}else if((s.charAt(i) > 64 && s.charAt(i) < 91) || (s.charAt(i) > 96 && s.charAt(i) < 123)){
				cSum ++;
			}else if(s.charAt(i) == ' '){
				sSum ++;
			}else{
				oSum ++;
			}
		}
		System.out.println(cSum + " " + nSum + " " + sSum + " " + oSum);
	}

}

Ruby :

ARGF.each{|s| print "#{s.scan(/[a-z]/i).length} #{s.scan(/[\d]/).length} #{s.scan(/[ ]/).length} #{s.scan(/[[:punct:]]/).length}\n" }

Python :

import re
#a = map(lambda x:int(x), raw_input().split())
a = raw_input()
#a = "aklsjflj123 sadf918u324 asdf91u32oasdf/.';123"
lenn = len(a)
kg = 0
zm = 0
sz = 0
qt = 0
for i in a:
    if i == ' ':
        kg += 1

p = re.compile(r'[a-z]')
zm =len(p.findall(a))
sz =len(re.compile(r'[0-9]').findall(a))
print "%d %d %d %d" % ( zm,sz,kg,lenn-sz -kg-zm)