Leo_H_lab9_1

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

int main()
{
    char a[100];
    fgets(a,sizeof(a),stdin);
    char b[100] = "";
    int word = 1;
    for (int i=0;i<strlen(a);i++){
        if (isalpha(a[i])){
            if (islower(a[i])){
                a[i]-=' ';
            }else{
                a[i]+=' ';
            }
        }
        if (word%2 == 0){
            strncat(b,&a[i],1);
        }
        if (a[i] == ' '){
            word++;
        }

    }
    for (int i=strlen(b)-2;i>=0;i--){
        printf("%c",b[i]);
    }

    return 0;

}