"%removews(     %"     heinzi    "   )"
"%substring(1,3,0123456789)" = "123"
"%substring(1,-3,0123456789)" = "12"
"%substring(5,0123456789)" = "56789"
"%substring(-3,0123456789)" = "789"
%<r=%streq(heinz,heinz)>"%if(%r,1,0)" = "1"
%<r=%streq(heinz,deinz)>"%if(%r,1,0)" = "0"
%<r=%strcmp(abc,xyz)>"%if(%[%r<0],-1,%if(%[%r==0],0,1))" = "-1"
%<r=%strcmp(abc,abc)>"%if(%[%r<0],-1,%if(%[%r==0],0,1))" = "0"
%<r=%strcmp(xyz,abc)>"%if(%[%r<0],-1,%if(%[%r==0],0,1))" = "1"
