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# first output line: 72 c3 a9 73 75 6d c3 a9 0a ... # second output line: 72 e9 73 75 6d e9 0a r e9 s u m e9 nl
# first line (after binmode STDOUT, ":utf8") 72 c3 83 c2 a9 73 75 6d c3 83 c2 a9 0a ... # second line (still ":utf8") 72 c3 a9 73 75 6d c3 a9 0a + r c3 a9 s u m c3 a9 nl