tomipooh@joho01-itpass:~$ ./quiz2.sh.txt 1234
1234
1 + 2 + 3 + 4
1 * 2 * 3 + 4
(1 + 2) + 3 + 4
(1 * 2) * 3 + 4
1 + (2 + 3) + 4
1 * (2 * 3) + 4
1 + 2 + (3 + 4)
(1 + 2 + 3) + 4
(1 * 2 * 3) + 4
1 + (2 + 3 + 4)
1 * (2 * 3 + 4)
(1 + 2) + (3 + 4)
tomipooh@joho01-itpass:~$ ./quiz2.sh.txt 123
123
the number must be four-digits.
can't make 10 !
tomipooh@joho01-itpass:~$ ./quiz2.sh.txt 12345
12345
the number must be four-digits.
tomipooh@joho01-itpass:~$ ./quiz2.sh.txt 7089
7089
can't make 10 !