In a Lotto I have ever played, one has to select 6 numbers from the set {1,2,...,49}.

 A popular strategy to play Lotto - although it doesn't increase your chance of

<span style="font-size:12.0000pt;font-family:'宋体';">winning</span> 

<span style="font-size:12.0000pt;font-family:'宋体';">&nbsp;-&nbsp;is&nbsp;to&nbsp;select&nbsp;a&nbsp;subset&nbsp;S&nbsp;containing&nbsp;</span><span style="font-style:italic;font-size:12.0000pt;font-family:'宋体';">k</span><span style="font-size:12.0000pt;font-family:'宋体';">&nbsp;(</span><span style="font-style:italic;font-size:12.0000pt;font-family:'宋体';">k</span><span style="font-size:12.0000pt;font-family:'宋体';">&gt;6)&nbsp;of&nbsp;these&nbsp;49&nbsp;numbers,&nbsp;and&nbsp;then&nbsp;play&nbsp;sever</span> 

<span style="font-size:12.0000pt;font-family:'宋体';">al&nbsp;games&nbsp;with&nbsp;choosing&nbsp;numbers&nbsp;only&nbsp;from&nbsp;S.&nbsp;For&nbsp;example,&nbsp;for&nbsp;</span><span style="font-style:italic;font-size:12.0000pt;font-family:'宋体';">k</span><span style="font-size:12.0000pt;font-family:'宋体';">=8&nbsp;and&nbsp;S&nbsp;=&nbsp;{1,2,3,5,8,13</span> 

<span style="font-size:12.0000pt;font-family:'宋体';">,21,34}&nbsp;there&nbsp;are&nbsp;28&nbsp;possible&nbsp;games:&nbsp;[1,2,3,5,8,13],&nbsp;[1,2,3,5,8,21],&nbsp;[1,2,3,5,8,34], <br />

<span style="font-size:12.0000pt;font-family:'宋体';">[1,2,3,5,13,21],&nbsp;...&nbsp;[3,5,8,13,21,34].</span><span style="font-size:12.0000pt;font-family:'宋体';"></span> 

<span style="font-size:12.0000pt;font-family:'宋体';">Your&nbsp;job&nbsp;is&nbsp;to&nbsp;write&nbsp;a&nbsp;program&nbsp;that&nbsp;reads&nbsp;in&nbsp;the&nbsp;number&nbsp;</span><span style="font-style:italic;font-size:12.0000pt;font-family:'宋体';">k</span><span style="font-size:12.0000pt;font-family:'宋体';">&nbsp;and&nbsp;the&nbsp;set&nbsp;S&nbsp;and&nbsp;then <br />

<span style="font-size:12.0000pt;font-family:'宋体';">prints&nbsp;all&nbsp;possible&nbsp;games&nbsp;choosing&nbsp;numbers&nbsp;only&nbsp;from&nbsp;S.</span><span style="font-size:12.0000pt;font-family:'宋体';"></span> 

The input file will contain one or more test cases. Each test case consists of one

<span style="font-size:12.0000pt;font-family:'宋体';">line&nbsp;containing&nbsp;several&nbsp;integers&nbsp;separated&nbsp;from&nbsp;each&nbsp;other&nbsp;by&nbsp;spaces.&nbsp;The&nbsp;first <br />

<span style="font-size:12.0000pt;font-family:'宋体';">integer&nbsp;on&nbsp;the&nbsp;line&nbsp;will&nbsp;be&nbsp;the&nbsp;number&nbsp;</span><span style="font-style:italic;font-size:12.0000pt;font-family:'宋体';">k</span><span style="font-size:12.0000pt;font-family:'宋体';">&nbsp;(6&nbsp;&lt;&nbsp;</span><span style="font-style:italic;font-size:12.0000pt;font-family:'宋体';">k</span><span style="font-size:12.0000pt;font-family:'宋体';">&nbsp;&lt;&nbsp;13).&nbsp;Then&nbsp;</span><span style="font-style:italic;font-size:12.0000pt;font-family:'宋体';">k</span><span style="font-size:12.0000pt;font-family:'宋体';">&nbsp;integers,&nbsp;specifying <br />

<span style="font-size:12.0000pt;font-family:'宋体';">the&nbsp;set&nbsp;S,&nbsp;will&nbsp;follow&nbsp;in&nbsp;ascending&nbsp;order.&nbsp;Input&nbsp;will&nbsp;be&nbsp;terminated&nbsp;by&nbsp;a&nbsp;value&nbsp;of</span> 

<span style="font-size:12.0000pt;font-family:'宋体';">&nbsp;zero&nbsp;(0)&nbsp;for&nbsp;</span><span style="font-style:italic;font-size:12.0000pt;font-family:'宋体';">k</span><span style="font-size:12.0000pt;font-family:'宋体';">.</span> 

For each test case, print all possible games, each game on one line. The numbers of

 each game have to be sorted in ascending order and separated from each other by

<span style="font-size:12.0000pt;font-family:'宋体';">exactly&nbsp;one&nbsp;space.&nbsp;The&nbsp;games&nbsp;themselves&nbsp;have&nbsp;to&nbsp;be&nbsp;sorted&nbsp;lexicographically,&nbsp;that <br />

<span style="font-size:12.0000pt;font-family:'宋体';">means&nbsp;sorted&nbsp;by&nbsp;the&nbsp;lowest&nbsp;number&nbsp;first,&nbsp;then&nbsp;by&nbsp;the&nbsp;second&nbsp;lowest&nbsp;and&nbsp;so&nbsp;on,&nbsp;as <br />

<span style="font-size:12.0000pt;font-family:'宋体';">demonstrated&nbsp;in&nbsp;the&nbsp;sample&nbsp;output&nbsp;below.&nbsp;The&nbsp;test&nbsp;cases&nbsp;have&nbsp;to&nbsp;be&nbsp;separated&nbsp;from <br />

<span style="font-size:12.0000pt;font-family:'宋体';">each&nbsp;other&nbsp;by&nbsp;exactly&nbsp;one&nbsp;blank&nbsp;line.&nbsp;Do&nbsp;not&nbsp;put&nbsp;a&nbsp;blank&nbsp;line&nbsp;after&nbsp;the&nbsp;last&nbsp;test <br />

<span style="font-size:12.0000pt;font-family:'宋体';">case.</span>