Characters+and+Concatenation

Specification
Write a program which asks the user for their first and last names. It should then concatenates the two strings, and also display the first characters of the forename and surname

Task
Write a new program which asks the user to enter a word at least 7 characters in length. The program should then display the 1st, 3rd and 6th characters of the word.

Questions
1. What does concatenation mean? 2. If the variable my_word = 'Hello, how are you', (a) What is my_word[0]? (b) What is my_word[5]? (c) What is my_word[6]? (d) What is my_word[7]?