{var $_false = false,
     $_true = true}
if(0)
{if $_true}
    ok(0)
{/if}/if(0)

if(1)
{if $_false}
    fail(1)
{/if}ok(1)
/if(1)

if(2)
{if $_true}
    ok(2)
{else}
    fail(2)
{/if}/if(2)

if(3)
{if $_false}
    fail(3)
{else}
    ok(3)
{/if}/if(3)

if(4)
{if $_true}
    ok(4)
{elseif $_false}
    fail(4)
{/if}/if(4)

if(5)
{if $_false}
    fail(5)
{elseif $_true}
    ok(5)
{/if}/if(5)

if(6)
{if $_false}
    fail(6)
{elseif $_false}
    fail(6)
{/if}ok(6)
/if(6)

if(7)
{if $_true}
    ok(7)
{elseif $_false}
    fail(7)
{else}
    fail(7)
{/if}/if(7)

if(8)
{if $_false}
    fail(8)
{elseif $_true}
    ok(8)
{else}
    fail(8)
{/if}/if(8)

if(9)
{if $_false}
    fail(9)
{elseif $_false}
    fail(9)
{else}
    ok(9)
{/if}/if(9)

if(10)
{if $_true}
    if(10)
    {if $_true}
        ok(10)
    {/if}/if(10)
{/if}/if(10)

if(11)
{if $_true}
    if(11)
    {if $_true}
        ok(11)
    {else}
        fail(11)
    {/if}/if(11)
{/if}/if(11)

if(12)
{if $_true}
    if(12)
    {if $_true}
        ok(12)
    {elseif $_false}
        fail(12)
    {/if}/if(12)
{/if}/if(12)

if(13)
{if $_true}
    if(13)
    {if $_true}
        ok(13)
    {elseif $_false}
        fail(13)
    {else}
        fail(13)
    {/if}/if(13)
{/if}/if(13)

if(14)
{if $_true}
    if(14)
    {if $_false}
        fail(14)
    {elseif $_true}
        ok(14)
    {else}
        fail(14)
    {/if}/if(14)
{/if}/if(14)