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"

P.S.: We will use cin/cout to read/write a string.

Input Format

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 Format

In the first line print two space-separated integers, representing the length of a and b respectively.
In the second line print the string produced by concatenating a and b (a + b).
In the 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

Explanation

•  a = “abcd”
•  b = “ef”
• |a| = 4
• |b| = 2
•  a + b =”abcdef”
•  a’ = “ebcd”
•  b’ = “af”

Solution Implementation

#include <iostream>
#include <string>
using namespace std;

int main() {
    string a,b;
    char t;
    cin>>a;
    cin>>b;
    cout<<a.size()<<" "<<b.size();
    cout<<"\n"<<a+b;
    t=a[0];
    a[0]=b[0];
    b[0]=t;
    cout<<endl<<a<<" "<<b;
    return 0;
}