s$ = input
print s$ & ",SUM"
repeat
   s$ = input
   until s$ = ""
   sum = 0
   for v in number strsplit s$ ","
      sum += v
   .
   print s$ & "," & sum
.
input_data
C1,C2,C3,C4,C5
1,5,9,13,17
2,6,10,14,18
3,7,11,15,19
4,8,12,16,20