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my %hash = $fh.slurp.comb(/ ^^ (\T*) \t (\N*) /);

my %hash = $fh.slurp ~~ m:g/ ^^ (\T*) \t (\N*) /;

my %hash = ($0,$1 if / ^^ (\T*) \t (\N*) / for $fh.lines);

my %hash = do for $fh.lines {
    / ^^ (\T*) \t (\N*) / and $0,$1;
}

my %hash = gather for $fh.lines {
    take / ^^ (\T*) \t (\N*) / || ();
}