#include <stdio.h>
#include <string.h>
#define STR_LEN 80
char str[STR_LEN+1];
void reverse();

int main (){
printf ("Enter a sentence: \n");
fgets(str,STR_LEN+1,stdin);

puts( str );
reverse();
return 0;
}


void reverse(){
char newstr[STR_LEN+1];
char thirdar[STR_LEN+1];
char fourar[STR_LEN+1];
char temp[STR_LEN+1];
char output[STR_LEN+1];
char symbol [STR_LEN+1];
int c = 0;
int i;
char ch1;
char ch2;
char ch3;
for(i=0; i<STR_LEN; i++){
ch1 = str[i];
newstr[c] = ch1;
c++;
}
puts( newstr);
 int a = strlen(newstr);
 a  = a - 1;
c=0;
for(i=a;i>-1; i--){
 ch2 = newstr[i];
 thirdar[c] = ch2;
  c++;
}

puts( thirdar );


 int b = strlen(thirdar);


b=b - 1;

for(i=b;i>-1;i--){
while(c < b+1){
 ch3 = thirdar[i];
if ((ch3 != ' ') ||(ch3 != '?')||(ch3 != '!')||(ch3 != '.')){
 fourar[c] = ch3;
 fourar[c+1] = '\0';
 strcpy(temp, fourar);
 c--;
 c++;


}
else if(ch3 == ' '){
fourar[c] = ch3;
fourar[c+1] = '\0';
strcpy(temp, fourar);
c--;
c++;
}
else if((ch3 != '?')||(ch3 != '!')||(ch3 != '.')){
fourar[c] = ch3;
fourar[c+1] = '\0';
strcpy(symbol, fourar);
c--;
c++;
}
}
}
int d = strlen(temp);
int e = strlen(fourar);
if(e == d){
strcat(symbol, fourar);
strcpy(output, symbol);
}
else{
strcat(symbol,fourar);
strcat(symbol, temp);
strcpy(output, symbol);
}
puts( output);

}