#include<stdio.h>
#include<string.h>
int main(){
    char name[100];
    fgets(name,sizeof(name),stdin);
    name[strcspn(name,"\n")]= '\0';
    int len = strlen(name);
    if(len == 0){
        printf("Invalid Input");
        return 0;
    }
    
    for(int i = 0; i < len; i++){
        if(isdigit(name[i])) {
            printf("Invalid input");
            return 0;
        }
    }
       for(int row = 1;row <= len;row++){
           for(int s =0;s < (len - row);s++){
           printf(" ");
       }
       for(int j = 0;j < row;j++){
         printf("%c ",name[j] );
         if(j != row - 1)
         printf(" ");
           
       }
       printf(" \n");
    }
    return 0;
}