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import math
import sequtils
import sets
import strutils
func priority(item: int): int =
result = item - 96
if result < 0:
result += 58
func examine(sack: string): int =
let
size = sack.len div 2
other = to_hash_set sack[0 ..< size]
for c in sack[size .. ^1]:
if c in other:
return priority ord c
echo sum stdin.read_all.strip.split_lines.map examine
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