#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 j = 0;j<i;j++){
        printf("%c",name[j]);
        if (j < i - 1) {
            printf(" ");
        }
    }
    printf("\n");
 }
 return 1;
}