sumcol.hs:10:1: lexical error at character 'f'
<<ghc: 10676768 bytes, 4 GCs, 110140/110140 avg/max bytes residency (1 samples), 7M in use, 0.00 INIT (0.00 elapsed), 0.01 MUT (0.02 elapsed), 0.01 GC (0.01 elapsed) :ghc>>