115. Calendar
time limit per test: 0.25
sec. First year of new millenium is gone away. In commemoration of it write a program that finds the name of the day of the week for any date in 2001. Input Input is a line with two positive integer numbers N and M, where N is a day number in month M. N and M is not more than 100. Output Write current number of the day of the week for given date (Monday – number 1, … , Sunday – number 7) or phrase “Impossible” if such date does not exist. Sample Input 21 10 Sample Output 7  
