def f(a,b,s):i=a;exec["print s[1:]"*0**a,"f(a-i,b-1,s+'|'+'*'*i);i-=1;"*-~a][b>0] f(*map(int,raw_input()[::2])+[''])
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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