Birthday Statistics#6956
In a company, the birthdays of all employees are collected. Your task is to write a program to summarize the number of people that were born in each month.
The first line contains a positive integer (1 \leq n \leq 5000) which is the number of employees. The following lines contain the (4-digit number) of each employee and his/her birth date. The birth date is written in this particular format: day/month/year. Suppose that all dates in the input are valid dates.
Print out the month number ( — ) and the number of employees born in that month.
Example 1