PROGRAMMING:Judging numeric characters

Write a function to judge whether the specified character is a numeric character. If it is a function, return 1, otherwise return 0. Input the character in the main function, call the function and output the judgment result.
Input format:
Give 1 character in a line.
Output format:
For a given input character, the judgment result is yes or no.
Input example:
six
Output example:
yes
Input example:
H
Output example:
no






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