Робота з рядками
One day, an awkward secretary messed up personal affairs of students. Now they again need to order first by grade, and within a class by name.
The first line contains the number of personal affairs n (1 ≤ n ≤ 1000). Next to each of the n students the following data (each in its own line): full name, grade, date of birth. Surname and name - string of no more than 20 characters, the class - a string consisting of a number (from 1 to 11) and a letter (from "A" to "Z"), date of birth - the date in the format DD.MM.YY. It is guaranteed that there are no namesakes within the same class.
Print n lines, each of which contains the data for one student. Rows should be arranged first by class and then by last name.
3 Sidorov Sidor 9A 20.07.93 Petrov Petr 11B 23.10.92 Ivanov Ivan 9A 10.04.93
9A Ivanov Ivan 10.04.93 9A Sidorov Sidor 20.07.93 11B Petrov Petr 23.10.92