#include<stdio.h>
#include<string.h>
#include<ctype.h>
int create_equilateral_trianglr(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(j < 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;
}