#include<stdio.h>
#include<string.h>
#include<ctype.h>
int create_equilatera_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]);
        i+(j < i - 1) {
            print(" ");
        }
        }
        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;
    }