Problem 

In Python, a string can be split on a delimiter.

Example:

>>> a = "this is a string"
>>> a = a.split(" ") # a is converted to a list of strings. 
>>> print a
['this', 'is', 'a', 'string']

Joining a string is simple:

>>> a = "-".join(a)
>>> print a
this-is-a-string 

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Task

You are given a string. Split the string on a " " (space) delimiter and join using a - hyphen.

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Function Description

Complete the split_and_join function in the editor below.

split_and_join has the following parameters:

• string line: a string of space-separated words

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Returns

• string: the resulting string

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Input Format

The one line contains a string consisting of space separated words.

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Sample Input

this is a string   

Sample Output

this-is-a-string

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Program

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def split_and_join(line):
    a = line.split( )
    result = "-".join(a)
    return result

if __name__ == '__main__':
    line = input()
    result = split_and_join(line)
    print(result)