command loopArrays
    local lowA, uppA, nums, z
    put "a,b,c" into lowA
    put "A,B,C" into uppA
    put "1,2,3" into nums

    split lowA by comma
    split uppA by comma
    split nums by comma

    repeat with n = 1 to the number of elements of lowA
        put lowA[n] & uppA[n] & nums[n] & return after z
    end repeat
    put z

end loopArrays