C :

#include<stdio.h>
#include<string.h>
int main()
{
	char a[1001],b[500][30],c[30];
	int num[500];
	int i=0,j=0,k=0,count,temp;
	gets(a);
	while(a[i]!='\0')
	{   if(a[i]>=65&&a[i]<=90)
	      a[i]=a[i]+32;
		if(a[i]==' '||a[i]==','||a[i]=='.')
		{
			b[j][k]='\0';
			j++;
			k=0;
		}
		else
        {
			b[j][k]=a[i];
			k++;
		}
		i++;
	}
	b[j][k]='\0';
	count=j;
	for(i=0;i<=count;i++)
	{
		num[i]=1;
	}
	for(i=0;i<=count;i++)
	{
		if(b[i][0]=='\0')
			continue;
       for(j=i+1;j<=count;j++)
	   {     
		   
            if(strcmp(b[i],b[j])==0)
			{
				num[i]++;
				b[j][0]='\0';
			
			}
		
	   }
	}
	for(i=0;i<=count;i++)
	{
		if(b[i][0]=='\0')
			continue;
       for(j=i+1;j<=count;j++)
	   {   
			 if(strcmp(b[i],b[j])>0)
			{	
                 strcpy(c,b[i]);
				 strcpy(b[i],b[j]);
				 strcpy(b[j],c);
				 temp=num[i];
				 num[i]=num[j];
				 num[j]=temp;
			}
	   }
	}
    for(i=0;i<=count;i++)
	{
		if(b[i][0]!='\0')
		{   j=0;
			while(b[i][j]!='\0')
			{
				putchar(b[i][j]);
			    j++;
			}
			putchar(':');
			printf("%d\n",num[i]);
		}
		else
		{
			i++;
		}
	}
     return 0;
}

Java :

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    private static Scanner s = new Scanner (System.in) ;
    
    public static void main(String[] args) {
    	while(s.hasNext()){
    		String str = s.nextLine() ;
    		
    		str = str.replaceAll("\\,", "").replaceAll("\\.", "").toLowerCase() ;
    		String strs[] = str.split("\\s+") ;
    		Arrays.sort(strs) ;
    		for (int i = 0; i < strs.length; i++) {
    			int sum = 1 ;
    			for (int j = i+1; j < strs.length; j++) {
    				if(strs[i].equals(strs[j])){
    					sum++ ;
    					strs[j]="" ;
    				}
    				
    			}
    			if(strs[i].length()>0)
    			    System.out.println(strs[i]+":"+sum);
    		}
    		
    	}
		
	}
}