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#!/usr/bin/perl ... area1:place4:name2 area3:place3:name3 area5:place2:name2
data = area1:place1:name1 area1:place4:name2 area3:place3:name3 area5:place2: +name2 sorted = area1:place1:name1 area5:place2:name2 area3:place3:name3 area1:place4: +name2