#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("Invalied 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(" ");
        }
    }
    printf("\n");
}
return 1;
}
    int main(){
        char name[11];
        printf(" ");
        fgets(name,sizeof(name), stdin);
        name[strcpn(name, "\n")] = '\0';
        create_equilateral_triangle(name);
        return 0;
    }