Add multilingual language and systems learning tracks

ceb/expanded-23-2/lesson-1/main.py

@@ -0,0 +1,8 @@
+from collections import deque
+ready=deque([("A",2),("B",1)])
+order=[]
+while ready:
+    name,left=ready.popleft()
+    order.append(name)
+    if left>1: ready.append((name,left-1))
+print(" ".join(order))