Problem Statement

Rana likes doughnuts. She went to the doughnuts shop to get doughnuts for her friends. The shop sells the doughnuts in 4 types of boxes.

• single box: can hold 1 doughnut.
• half dozen box: can hold 6 doughnuts.
• dozen box: can hold 12 doughnuts.
• party box: 4 can hold 24 doughnuts.

Help Rana know how many boxes does she need based on the box type and the number of doughnuts she wants to buy.
Note: The shop has a policy that the number of bought doughnuts must always be exactly enough to fill all boxes.

Constraints

box-type is a string that matches one of the following strings:

• single
• half
• dozen
• party

D is an integer that represents the number of doughnuts.

Input

Input is in the following format:

box-type
D

Output

Print the total number of boxes required as an integer number.

Samples

Sample 1

Sample 2

Sample 3