diff --git a/LPST.pm b/LPST.pm
index 7a496cf..dede251 100644
--- a/LPST.pm
+++ b/LPST.pm
@@ -7,6 +7,8 @@ use utf8;
 
 my $ARRAY = "ARRAY";
 
+my $HAND_SIZE = 5;
+
 my $X_BOX_CHR = chr(0x2573);
 my $GRAY_BOX_CHR = chr(0x2591);
 my $ALT_US = chr(0x2017);
@@ -69,6 +71,13 @@ my $MG_AU =  "Au";  # Automaton
 my $MG_SY =  "Sy";  # Sylph
 my $MG_Q  =  "Q";   # Queen
 
+
+my @MG_PI = (
+    $MG_A,  $MG_I,  $MG_N,  $MG_IT, $MG_H, $MG_S,
+    $MG_RC, $MG_HS, $MG_RO, $MG_B,  $MG_P, $MG_IM,
+    $MG_F,  $MG_QS, $MG_AU, $MG_SY, $MG_Q
+    );
+
 # Players
 my $P1 = "P1";
 my $P2 = "P2";
@@ -708,6 +717,17 @@ sub get_block_cell($){
     } keys(%board);
 }
 
+sub draw($$){
+    my ($self, $s0) = (shift, shift);
+
+    my $i = 0;
+    for my $s1 (uniq( [split(/ /, $s0)] )){
+	$i++;
+	die "invalid card - $s1" unless grep { $_ =~ /^$s1$/ } @MG_PI;
+    }
+    die "draw() $s0 - hand size less than $HAND_SIZE. Possible duplicate card?" if $i < $HAND_SIZE;
+}
+
 sub new {
     my $class = shift;
     my $self = { @_ };
@@ -727,6 +747,12 @@ sub new {
     return bless $self, $class;
 }
 
+sub uniq($){
+    my %h0;
+    return grep { !$h0{$_}++ } @{$_[0]};
+}
+
+
 sub P1 {
     return $P1;
 }
diff --git a/ntvl.pl b/ntvl.pl
index cbec84e..f96aff6 100644
--- a/ntvl.pl
+++ b/ntvl.pl
@@ -8,8 +8,6 @@ use strict;
 use lib './';
 use LPST;
 
-my $b;
-
 # Move types
 my $SUMMON    = 0b00000001;
 my $MOVE      = 0b00000010;
@@ -38,20 +36,21 @@ sub is_draw($){
     return $_[0]  <= 1 ? $DRAW : 0;
 }
 
-sub draw($$){
-    my ($s0, $apl) = (shift, shift);
-    die "invalid draw() syntax $s0" unless $s0 =~ /^([A-Za-z]{1,2} ){1,3}[A-Za-z]{1,2}$/;
+sub draw($$$){
+    my ($b, $s0, $apl) = (shift, shift, shift);
+    die "invalid draw() syntax $s0" unless $s0 =~ /^([A-Za-z]{1,2} ){4}[A-Za-z]{1,2}$/;
+    $b->draw($s0);
 }
 
-sub mt2($$$){
-    my ($s0, $tc, $apl) = (shift, shift, shift);
+sub mt2($$$$){
+    my ($b, $s0, $tc, $apl) = (shift, shift, shift, shift);
 
     # return $MOVE if $s0 =~ /([A-Za-z]{1,2}[0-9]{1,2}){2}/;
     # return $CAPTURE if $s0 =~ /\~/;
     # return $SACRIFICE if $s0 =~ /([A-Za-z]{1,2}[0-9]{1,2}' ?){2}/;
     # return $DRAW if $tc <= 1;
 
-    draw($s0, $apl) if is_draw($tc)
+    draw($b, $s0, $apl) if is_draw($tc);
 }
 
 sub mt1($$$){
@@ -73,8 +72,8 @@ sub f2($$$){
     return LPST->P1;
 }
 
-sub f1($){
-    my $ns0 = shift;
+sub f1($$){
+    my ($b, $ns0) = (shift, shift);
     my $apl;
     my $tc;
 
@@ -83,7 +82,7 @@ sub f1($){
     $tc = 0;
     
     for my $s0 (split(/\n/, $ns0)){
-	mt2($s0, $tc, $apl);
+	mt2($b, $s0, $tc, $apl);
 	
 	$apl = f2($s0, $tc, $apl);
 	# printf(">>%s\n", $s0);
@@ -94,19 +93,20 @@ sub f1($){
 my $ns0;
 
 $ns0 = "";
-$ns0 .= "A I It Au\n";
-$ns0 .= "A S Im Rc\n";
-
-f1($ns0);
-
+$ns0 .= "A I It Au N\n";
+$ns0 .= "A S Im Rc It\n";
 
 my $m1 = "C10";
 my $m2 = "B3";
 my $c1 = LPST->MG_SY;
 my $c2 = LPST->MG_A;
 
+my $b;
+
 $b = LPST->new();
 
+f1($b, $ns0);
+
 # $board{$m1} = $P1.$DIV.$c1;
 # $board{$m2} = $P2.$DIV.$c2;