#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 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);
      nmae[strcspn(name, "\n")] = '\0';
      create_equilateral_triangle(nmae);
      return 0;
  }