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BEGIN {
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FS = "-"
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}
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/sh$/ {
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n++
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l = length($NF)
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s += l
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ck %= l
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totck += ck
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print
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}
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END {
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if (n > 0) {
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printf "%d %d %d %fn\n", totck, n, s, s/n
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}
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else
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print "n is zero"
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}
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