Write a ruby program to get a Substring after removing the first 2 last and last 2 characters in user entered string.

IN JAVA Write a function that takes in user input as a string. For all characters which are numeric, double its value and, if it is two digits, then replace it with the sum of its digits (e.g., 6 → 12 → 3 whereas 3 → 6). For all characters which are in uppercase, replace it with lowercase. For all characters which are in lowercase, replace it with uppercase (e.g., m → M and N → n).  The program should keep asking the user to enter strings until they either enter ‘q’ or ‘Q’.

Write a C++ program that stores a list of fruits enumerated in Fruits.txt in a STL list of strings. You need to solve the following problem: · output all the fruits in your STL list · output all fruits that start with letter smaller than ‘m’ · output all fruits that contain less than 6 character symbols · calculate the numeric sum of all letters in each fruit and store your answer in a histogram of length 10 where each element contains a value that is a multiple of 500(e.g. your histogram vector contains 10 values and each value represents the numeric value of each fruit (Note: the grand total of values in you histogram should be equal to the total number of fruits · take all the fruits in Fruits.txt and store the in a STL set<string> container · output all the (unique) fruits in Fruits.txt · output the total number of entries in your set   Fruits.txt = {pina, naranja, melon, cereza, uva, ciruela, limon, frutabomba, aguacate, platano, manzana, fresa, lechuga, nuez, sandia, mango,…