new file:   2nd/10lower.c
	new file:   2nd/1limit.c
	new file:   2nd/2loop.c
	new file:   2nd/3htoi.c
	new file:   2nd/4squeeze.c
	new file:   2nd/5any.c
	new file:   2nd/67test.c
    new file:   2nd/8rightrot.c
	new file:   2nd/9bitcount.c