#include <stdio.h>
#include <string.h>
#include <ctype.h>

int isAlphabetOnly(char *str) {
    for (int i = 0; str[i] != '\0'; i++) {
        if (!isalpha((unsigned char)str[i]))
            return 0;
    }
    return 1;
}

int isLengthValid(char *str, int min, int max) {
    int len = strlen(str);
    return (len >= min && len <= max);
}

int main() {
    char str1, str2;
    printf("Enter first string: "); fgets(str1, 100, stdin); str1[strcspn(str1,"\n")]=0;
    printf("Enter second string: "); fgets(str2, 100, stdin); str2[strcspn(str2,"\n")]=0;

    if (!isAlphabetOnly(str1) || !isAlphabetOnly(str2))
        printf("Invalid input: strings must contain only alphabets.\n");
    else if (!isLengthValid(str1, 1, 99) || !isLengthValid(str2, 1, 99))
        printf("Invalid input: string length must be between 1 and 99.\n");
    else {
        
    }
}