Helpful Maths - Implementation

plaintext
function helpfulMaths(s)
count1 := 0
count2 := 0 count3 := 0
for each character c in s
if c = '1' then
 count1 := count1 + 1
else
 if c = '2' then
 count2 := count2 + 1
 else
 if c = '3' then
 count3 := count3 + 1 // skip '+' characters
 result := "" first := true
 for i from 1 to count1
 if not first then
 result := result + "+" result := result + "1"
 first := false
 for i from 1 to count2
 if not first then
 result := result + "+"
 result := result + "2" first := false
 for i from 1 to count3
 if not first then
 result := result + "+" result := result + "3"
 first := false
 return result