#include<stdio.h>
#include<string.h>
#include<ctype.h>
int create_equilateral_triangle(char *name){
    int len = strlen(name);
    if (len < 1 || len > 10){
        printf("Invalid input\n");
        return 0;
    }
    for (int i = 0; i<len;i++){
        if (isdigit(name[i])){
            printf("Invalid input\n");
            return 0;
        }
    }
        for (int i = 1; i <= len;i++){
            for (int j =i; j < len; j++){
                printf("");
            }
            for (int j = 0;j<i;j++){
                printf("%c ",name[j]);
                if (i < i - 1) {
                    printf("  ");
        }
            }
        printf("\n");
    }
    
    return 1;
 }
 
 int main() {
     char name[11];
     
     printf(" ");
     fgets(name, sizeof(name), stdin);
     
     name[strcspn(name,  "\n")] = '\0';
     
     create_equilateral_triangle(name);
     
     return 0;
 }