// editor4
#include<stdio.h>
#include<string.h>
#include<stdlib.h>

int main() {
    char inputString[101];
    printf("Enter the numeric string: ");
    scnaf("%s", inputString);
    
    int len = strlen(inputString);
    
    if (len % 2 != 0 || len > 100) {
        printf("Invalid Input\n");
        return 1;
    }
    char decodedMessage[51];
    int decodedIndex = 0;
    
    for (int i = 0; i < len; i += 2) {
        char digit1 = inputString[i];
        char digit2 = inputString[i+1];
        
        if (digit < '0' || digit1 > '9' || digit2 < '0' || digit2 > '9') {
            printf("Invalid Input\n");
            return 1;
        }
        int asciiValue = (digit1 - '0') * 10 + (digit2 - '0');
        if(asciiValue >= 65 && asciiValue <= 90)
    } else {
        printf("Invalid Input\n");
        return 1;
    }
}
decodedMessage[decodedIndex] = '\0'
printf("%s\n",decodedMessage);
}