Strings

C++ provides a nice alternative data type to manipulate strings, and the data type is conveniently called string. Some of its widely used features are the following:

• Declaration:

  string a = "abc";

• Size:

  int len = a.size();

• Concatenate two strings:

  string a = "abc";
  string b = "def";
  string c = a + b; // c = "abcdef".

• Accessing i^th element:
  

  string s = "abc";
  char c0 = s[0]; // c0 = 'a'
  char c1 = s[1]; // c1 = 'b'
  char c2 = s[2]; // c2 = 'c'
  
  s[0] = 'z'; // s = "zbc"

Try the following example in the editor below.

You are given two strings, A and B, separated by a new line. Each string will consist of lower case Latin characters (‘a’-‘z’).

Output three lines:

• First line print two space-separated integers, representing the length of A and B respectively.
• Second line print the string produced by concatenating A and B (A+B).
• Third line print two strings separated by a space, A' and B'. A' and B' are the same as A and B, respectively, except that their first characters are swapped.

Sample input:

abcd
ef

Sample Output:

4 2
abcdef
ebcd af