#include<stdio.h>
#include<string.h>
3include<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 (j < i - 1)
            {
                printf(" ");
            }
        }
        printf("\n");
    }
    return 1;
}
    return 1;
    }
    int main()
    {
        char name[11];
        printf(" ");
        fgets(name, sizeof(name), stdin);
        name[strcspn(name, "\n")] = '\0';
        create_equilateral_triangle(name);
        return 0;
    }
    }