#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[1])) {
            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);
    
    name[strcspn(name, "\n")] = '\0';
    
    create_equilateral_triangle(name);
    
    return 0;
    
}    
}
        
        }
    }
}