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use Modern::Perl; use Data::Dumper; ... AB1\tA{Daniel Wright}\sA{Jack Smith}\sB{Jane Goodwin} QW1\tA{Samantha Patton}\sC{Timothy Eeckles} AR2\tA{Jane Goodwin}
$VAR1 = { 'Jane Goodwin' => 2, 'Daniel Wright' => 1, ... 'Jack Smith' => 1, 'Samantha Patton' => 1 };