need help understanding in c++

ZyBooks catalog Fee CHALLENGE ACTIVITY 3.3.2: Print two strings in alphabetical order. Print the two strings, firstString and secondString, in alphabetical order. Assume the strings are lowercase. End with newline. Sample output capes rabbits 1 #include > firstString; cin >> secondString; 11 12 y Your solution goes here 13 14 return; 15 } Run Terminal