data = open('day3data', 'r+')

data = data.read()

data_list = data.split('\n')

#print (data_list)

def space_remover(list_of_sides):
    for triangle in list_of_sides:
        triangle = triangle.split(' ')
        for element in triangle:
            try:
                element = int(element)
            except ValueError:
                triangle.remove(element)
        return (triangle)

print (space_remover(data_list))