C :

#include<stdio.h>   
#include<stdlib.h>   
#include<string.h>   
#include<math.h>   
  
char str[1000],string[1001][1001],string2[1001][1001];  
  
int main()  
{  
    int n,i,j,index = 0,k;     
    gets(str);  
    while(gets(string[index]))  
    {  
        if(strcmp(string[index],"}") == 0){  
            break;  
        }  
        index++;  
    }    
    for(i = 0;i < strlen(str);i++){  
        if(str[i] >= 'A' && str[i] <= 'Z'){  
            str[i] = str[i] - 'A' + 'a';  
        }  
    }  
    for(i = 0;i <= index;i++){    
        for(j = 0;j < strlen(string[i]);j++){     
            string2[i][j] = string[i][j];     
            if(string[i][j] >= 'A' && string[i][j] <= 'Z'){  
                string[i][j] = string[i][j] - 'A' + 'a';  
            }  
        }    
        j = 0,k = 0;  
        for(j = 0,k = 0;j < strlen(string[i]);){       
            if(string[i][j+k] == str[k]){  
                k++;         
                if(k == strlen(str)){  
                    j = j+k;  
                }  
            }    
            else{                    
                if(string[i][j] != ' '){  
                    //string3[i][m++] = string2[i][j];   
                    printf("%c",string2[i][j]);  
                }  
                j++;  
                k = 0;  
            }  
        }//for   
        printf("\n");  
    }  
    return 0;  
}