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There is a monkey which can walk around on a planar grid. The monkey can move one space at a time left, right, up or down. That is, from (x, y) the monkey can go to (x+1, y), (x-1, y), (x, y+1), and (x, y-1).
Points where the sum of the digits of the absolute value of the x coordinate plus the sum of the digits of the absolute value of the y coordinate are lesser than or equal to 19 are accessible to the monkey. For example, the point (59, 79) is inaccessible because 5 + 9 + 7 + 9 = 30, which is greater than 19. Another example: the point (-5, -7) is accessible because abs(-5) + abs(-7) = 5 + 7 = 12, which is less than 19.
How many points can the monkey access if it starts at (0, 0), including (0, 0) itself?
Input sample:
There is no input for this program.
Output sample:
Print the number of points the monkey can access. It should be printed as an integer — for example, if the number of points is 10, print "10", not "10.0" or "10.00", et