what changes should be made to satisfy the below output?

Question

Input :
"Howdy! Hope your day goes well!"
"The inhabitants of Universe are called Guardians"
"UniVerSE UNIVERSE universe are different ways to write Universe!"
Output :
"Hello, World!"
"Hello, Universe!"
"Hello, Universe!!!!"
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    #include<stdio.h>  
    #include<string.h>
    int main()  
    {  
       char str[200],str1[]="Hello Universe",str2[]="!"; 
       int value;
       scanf("%s",str);  
       // comparing both the strings using strcmp() function  
       int count =0;
       value=strcmp(str,("universe"));  
       for (int i = 0; i < count; i++){
       if(value==0)  {
           strcat(str1,str2);
            printf(str1);
       }
       else  
       printf("Hello world!");  
       return 0;  
       }
    }