representation problem

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I'm having trouble with this problem. How do you destinguish between these.
They have the same length and they are both sequences but I need to treat
them differently. for a i need to loop through and print each number but for
b i need to print the string. I'm trying to modify Buddy Hyllberg data dump
but am lost in this problem.

sequence a,b

a = {1,2,3,4}
b = "1234"

printf(1,"len a = %d  len b = %d\n",{length(a),length(b)})

if atom(a) then puts(1,"a is an atom\n") else puts(1,"a is a seq\n") end if

if atom(b) then puts(1,"b is an atom\n") else puts(1,"b is a seq\n") end if


b = gets(0)

george

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