#!/usr/bin/env perl

use strict; use warnings;
use JSON::PP;

$_ = do { local $/; <STDIN> };
s/(?=[^\n])\z/\n/;

my $rows = [];
my $row = [];
my $cell = '';
my $E = '(?=[\t\n]|\z)';
while (length != 0) {
    # warn ">>${\ substr($_, 0, 30)}<<\n";
    if (s/^\t//) {
        push @$row, $cell;
        $cell = '';
        next;
    }
    if (s/^\n//) {
        push @$row, $cell;
        $cell = '';
        push @$rows, $row;
        $row = [];
        next;
    }
    if (s/\A"((?:""|.)*?)"$E//s) {
        $cell = $1;
        $cell =~ s/""/"/g;
    }
    elsif (s/\A(.*?)$E//) {
        $cell = $1;
    }
    else {
        die "failed to parse here >>${\ substr($_, 0, 80)}<<";
    }
}

print JSON::PP->new->encode($rows);