TEST DATA FOR `dsums'

Input for test 1

1 20 2

Output for test 1

3

Input for test 2

1 100 5

Output for test 2

11

Input for test 3

1 1000 6

Output for test 3

111

Input for test 4

10001 11001 7

Output for test 4

111

Input for test 5

40003 41003 8

Output for test 5

112

Input for test 6

53333 55999 1

Output for test 6

297

Input for test 7

8338533 8343543 4

Output for test 7

556

Input for test 8

753000 857000 3

Output for test 8

11555

Input for test 9

9000000 9300000 5

Output for test 9

33333

Input for test 10

9000002 10000000 2

Output for test 10

111111