import builtins
import unittest


def main():
    ''' Main app '''
    range_start = int(input())
    range_stop = int(input())
    for i in range(range_start, range_stop):
        print(i)


class TestMethods(unittest.TestCase):

    def mock_print(self, message, *args, **kwargs):
        '''
        Alters built-in input() function.
        Gathers output to list buffer.
        '''
        self.output_buffer.append(message)

    def mock_input(self, *args, **kwargs):
        '''
        Alters built-in print() function.
        Injects input data from list buffer.
        '''
        return self.input_data.pop()

    def set_input(self, input_data):
        '''Supplies data for mock_input().'''
        self.input_data = input_data
        self.input_data.reverse()

    def get_output(self):
        '''Returns data gathered by mock_print().'''
        output = self.output_buffer
        self.output_buffer = []
        return output

    def setUp(self):
        # let's store original functions somewhere
        self.original_input = builtins.input
        self.original_print = builtins.print
        # declate a buffer for output data
        self.output_buffer = []
        # we are replacing built-in function input() and output()
        builtins.input = self.mock_input
        builtins.print = self.mock_print

    def test_typical_case(self):
        # set test data
        input_data = ['2', '5']
        output_data = [2, 3, 4]
        # set desired input
        self.set_input(input_data)
        # run a function
        main()
        # assert output
        self.assertListEqual(self.get_output(), output_data)

    def test_empty(self):
        # set test data
        input_data = ['1000', '0']
        output_data = []
        # set desired input
        self.set_input(input_data)
        # run a function
        main()
        # assert output
        self.assertListEqual(self.get_output(), output_data)

    def tearDown(self):
        # let's restore original function
        builtins.input = self.original_input
        builtins.print = self.original_print


if __name__ == '__main__':
    unittest.main()