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Task/ABC-Problem/Tcl/abc-problem.tcl

@@ -0,0 +1,21 @@
+package require Tcl 8.6
+
+proc abc {word {blocks {BO XK DQ CP NA GT RE TG QD FS JW HU VI AN OB ER FS LY PC ZM}}} {
+    set abc {{letters blocks abc} {
+	set rest [lassign $letters ch]
+	set i 0
+	foreach blk $blocks {
+	    if {$ch in $blk && (![llength $rest]
+		    || [apply $abc $rest [lreplace $blocks $i $i] $abc])} {
+		return true
+	    }
+	    incr i
+	}
+	return false
+    }}
+    return [apply $abc [split $word ""] [lmap b $blocks {split $b ""}] $abc]
+}
+
+foreach word {"" A BARK BOOK TREAT COMMON SQUAD CONFUSE} {
+    puts [format "Can we spell %9s? %s" '$word' [abc $word]]
+}