#include<stdio.h>
#include<string.h>
#include<ctype.h>
int is_valid_input(const char *name) {
    int length = strlen(name);
    if(length < 1 || length > 10) {
        return 0;
    }
    for (int i = 0; i < length; i++) {
        if (isdigit((unsigned char)name[i])) {
            return 0;
            
        }   
    }
    return 1;
}
void print_pyramid(const char *name) {
    int length = strlen(name);
    for (int n = 1; n <= length; n++) {
        for (int i = 0; i < n; i++) {
        }
        printf("\n");
    }
}
    
    int main () {
        char name[11];
        printf("Enter a name");
        if (fgets(name, sizeof(name),stdin) == NULL) {
            return 1;
        }
        name[strcspn(name, "\n")] = 0;
        if (is_valid_input(name)) {
            printf("\npyramid pattern\n");
            print_pyramid(name);
        } else{
            printf("Invalid input\n");
           
        return 0;
}