diff --git a/shared/src/test/scala/cpstest/PolyContT.scala b/shared/src/test/scala/cpstest/PolyContT.scala
index f75acd66..30ed9d62 100644
--- a/shared/src/test/scala/cpstest/PolyContT.scala
+++ b/shared/src/test/scala/cpstest/PolyContT.scala
@@ -1,21 +1,46 @@
 package cpstest
 
-import cps.CpsTryMonad
+import scala.util.*
+import cps.*
+import cpstest.PolyContT.PolyStepTry
+
 
 sealed trait PolyContT[F[_], A] {
 
   basePolyContT =>
 
-  def run[B](f: A => F[B]): F[B]
+  def run[B](f: A => F[B])(using m: CpsTryMonad[F]): F[B] =
+    runTry{
+      case Success(a) => f(a)
+      case Failure(ex) => m.fromTry(Failure(ex))
+    }
 
+  def runTry[B](f: Try[A]=>F[B]): F[B]
 
   def map[B](f: A => B)(using m:CpsTryMonad[F]): PolyContT[F,B] =
     new PolyContT[F,B]{
-      override def run[C](g: B => F[C]): F[C] =
-        m.flatMap(basePolyContT.run(x => summon[CpsTryMonad[F]].pure(f(x))))(g)
+      override def runTry[C](g: Try[B] => F[C]): F[C] =
+        m.flatMapTry(basePolyContT.run(x => summon[CpsTryMonad[F]].pure(f(x))))(g)
+    }
+
+  def flatMap[B](f: A => PolyContT[F,B])(using m:CpsTryMonad[F]): PolyContT[F,B] =
+    new PolyContT[F,B]{
+      override def runTry[C](g: Try[B]=> F[C]): F[C] =
+        basePolyContT.run(a => f(a).runTry(g))
+    }
+
+  def flatMapTry[B](f: Try[A] => PolyContT[F,B])(using m:CpsTryMonad[F]): PolyContT[F,B] =
+    new PolyContT[F,B]{
+      override def runTry[C](g: Try[B]=> F[C]): F[C] =
+        basePolyContT.runTry(a => f(a).runTry(g))
     }
 
 
+  def shiftTry(poly: PolyStepTry[F,A])(using m:CpsTryMonad[F]): PolyContT[F,A] =
+    new PolyContT[F,A]{
+      override def runTry[B](f: Try[A] => F[B]): F[B] =
+        poly.run(f)
+    }
 
 }
 
@@ -23,9 +48,8 @@ sealed trait PolyContT[F[_], A] {
 
 object PolyContT {
 
-    sealed trait ContTStep[F[_],A,B] extends Function1[A, F[B]]  {
-
-    }
+  
+    trait ContTStep[F[_],A,B] extends Function1[A, F[B]]
 
     case class FunStep[F[_],A,B](f: A => F[B]) extends ContTStep[F,A,B] {
       def apply(a: A): F[B] = f(a)
@@ -36,5 +60,9 @@ object PolyContT {
         summon[CpsTryMonad[F]].flatMap(f(a))(g)
     }
 
+    trait PolyStepTry[F[_],A] {
+        def run[B](k: (Try[A]=>F[B])): F[B]
+    }
 
+  
 }
\ No newline at end of file