diff --git a/coa b/coa
new file mode 100644
index 00000000..78981922
--- /dev/null
+++ b/coa
@@ -0,0 +1 @@
+a
diff --git a/coaa b/coaa
new file mode 100644
index 00000000..4bcfe98e
--- /dev/null
+++ b/coaa
@@ -0,0 +1 @@
+d
diff --git a/d b/d
new file mode 100644
index 00000000..4bcfe98e
--- /dev/null
+++ b/d
@@ -0,0 +1 @@
+d
diff --git a/eg b/eg
new file mode 100644
index 00000000..3fd584a4
--- /dev/null
+++ b/eg
@@ -0,0 +1 @@
+eg
diff --git a/zx b/zx
new file mode 100644
index 00000000..f03f6945
--- /dev/null
+++ b/zx
@@ -0,0 +1 @@
+dd