September 2017 Update

Task/ABC-Problem/Zkl/abc-problem.zkl

@@ -0,0 +1,19 @@
+var blocks=T("BO", "XK", "DQ", "CP", "NA", "GT", "RE", "TG", "QD", "FS",
+	     "JW", "HU", "VI", "AN", "OB", "ER", "FS", "LY", "PC", "ZM", );
+
+fcn can_make_word(word){
+   fcn(blks,word){
+      if (not word) return(True);  // bottom of recursion
+      foreach b in (blks){ n:=__bWalker.idx;
+	 if(not b.holds(word[0])) continue; // letter not on this block
+	 blks.del(n);		// remove this block from pile
+	 if (self.fcn(blks,word[1,*])) return(True);  // try remaining blocks
+	 blks.insert(n,b);	// put block back in pile: backtracking
+      }
+      False;   // out of blocks but not out of word
+   }(blocks.copy(),word.toUpper())
+}
+
+foreach word in (T("","A","BarK","BOOK","TREAT","COMMON","SQUAD","Confuse","abba")){
+   can_make_word(word).println(": ",word);
+}