#!/usr/bin/perl
use warnings;
use strict;

my %matrix;
my @symbols = qw/A     R      N      D      C      Q      E      G    
+  H      I      L      K      M      F      P      S      T      W   
+   Y      V/;
my @table = (.9799, .0002, .0009, .0010, .0003, .0008, .0017, .0021, .
+0002, .0006, .0004, .0002, .0006, .0002, .0022, .0035, .0032, .0000, 
+.0002, .0018,
             .0001, .9929, .0001, .0000, .0001, .0010, .0000, .0000, .
+0010, .0003, .0001, .0019, .0004, .0001, .0004, .0006, .0001, .0008, 
+.0000, .0001,
             .0004, .0001, .9867, .0036, .0000, .0004, .0006, .0006, .
+0021, .0003, .0001, .0013, .0000, .0001, .0002, .0020, .0009, .0001, 
+.0004, .0001,
             .0006, .0000, .0042, .9869, .0000, .0006, .0053, .0006, .
+0004, .0001, .0000, .0003, .0000, .0000, .0001, .0005, .0003, .0000, 
+.0000, .0001,
             .0001, .0001, .0000, .0000, .9987, .0000, .0000, .0000, .
+0001, .0001, .0000, .0000, .0000, .0000, .0001, .0005, .0001, .0000, 
+.0000, .0002,
             .0003, .0010, .0004, .0005, .0000, .9901, .0027, .0001, .
+0024, .0001, .0003, .0006, .0004, .0000, .0006, .0002, .0002, .0000, 
+.0000, .0001,
             .0010, .0000, .0007, .0056, .0000, .0035, .9865, .0004, .
+0002, .0003, .0001, .0004, .0001, .0000, .0003, .0004, .0002, .0000, 
+.0001, .0002,
             .0021, .0001, .0012, .0011, .0001, .0003, .0007, .9906, .
+0001, .0000, .0001, .0002, .0001, .0001, .0003, .0021, .0003, .0000, 
+.0000, .0005,
             .0001, .0008, .0018, .0003, .0001, .0020, .0001, .0000, .
+9933, .0000, .0001, .0001, .0000, .0002, .0003, .0001, .0001, .0001, 
+.0004, .0001,
             .0002, .0002, .0003, .0001, .0002, .0001, .0002, .0000, .
+0000, .9915, .0009, .0002, .0012, .0007, .0000, .0001, .0007, .0000, 
+.0001, .0033,
             .0003, .0001, .0003, .0000, .0000, .0006, .0001, .0001, .
+0004, .0022, .9871, .0002, .0045, .0013, .0003, .0001, .0003, .0004, 
+.0002, .0015,
             .0002, .0037, .0025, .0006, .0000, .0012, .0007, .0002, .
+0002, .0004, .0001, .9858, .0020, .0000, .0003, .0008, .0011, .0000, 
+.0001, .0001,
             .0001, .0001, .0000, .0000, .0000, .0002, .0000, .0000, .
+0000, .0005, .0009, .0005, .9968, .0001, .0000, .0001, .0002, .0000, 
+.0000, .0005,
             .0001, .0001, .0001, .0000, .0000, .0000, .0000, .0001, .
+0002, .0008, .0006, .0000, .0004, .9944, .0000, .0000, .0001, .0003, 
+.0028, .0000,
             .0013, .0005, .0002, .0001, .0001, .0008, .0003, .0002, .
+0005, .0001, .0002, .0002, .0001, .0001, .9935, .0012, .0004, .0000, 
+.0000, .0002,
             .0028, .0011, .0034, .0007, .0011, .0004, .0006, .0016, .
+0002, .0002, .0001, .0007, .0004, .0003, .0017, .9800, .0038, .0005, 
+.0002, .0002,
             .0022, .0002, .0013, .0004, .0001, .0003, .0002, .0002, .
+0001, .0011, .0002, .0008, .0006, .0001, .0005, .0032, .9874, .0000, 
+.0002, .0009,
             .0000, .0002, .0000, .0000, .0000, .0000, .0000, .0000, .
+0000, .0000, .0000, .0000, .0000, .0001, .0000, .0001, .0000, .9995, 
+.0001, .0000,
             .0001, .0000, .0003, .0000, .0003, .0000, .0001, .0000, .
+0004, .0001, .0001, .0000, .0000, .0021, .0000, .0001, .0001, .0002, 
+.9960, .0001,
             .0013, .0002, .0001, .0001, .0003, .0002, .0002, .0003, .
+0003, .0057, .0011, .0001, .0017, .0001, .0003, .0002, .0010, .0000, 
+.0002, .9866);

for my $column (@symbols) {
    for my $row (@symbols) {
        $matrix{$column}{$row} = shift @table;
    }
}

my $string;
$string = 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA'
+;
#$string = 'SVEQRISTDIGQAYQLQGLGSNLRSIRSKTGAGEVNYIDAAKSVNDNQLLAEIG';

print "$string\n";
print map mutate($_), split //, $string;
print "\n";

sub mutate {
    my $char = shift;
    my $rand = rand;
    my $result = 0;
    while ($rand > 0 and $result <= @symbols) {
        $rand -= $matrix{$char}{$symbols[$result++]};
    }
    return $symbols[$result - 1];
}
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