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path: root/go/etl/etl.go
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package etl

import "strings"

func Transform(in map[int][]string) map[string]int {
	out := make(map[string]int)
	for k, v := range in {
		for _, a := range v {
			out[strings.ToLower(a)] = k
		}
	}
	return out
}