diff --git a/data/i.18 b/data/i.18
new file mode 100644
index 0000000..a464fd1
--- /dev/null
+++ b/data/i.18
@@ -0,0 +1,18 @@
+0	0
+10	7
+12	3
+20	8
+13	17
+10	12
+12	14
+14	9
+8	10
+6	14
+10	15
+7	18
+0	16
+1	13
+3	15
+5	8
+-2	9
+5	5
diff --git a/data/i.snake b/data/i.snake
new file mode 100644
index 0000000..83524fc
--- /dev/null
+++ b/data/i.snake
@@ -0,0 +1,12 @@
+10	0
+20	10
+30	0
+40	10
+50	0
+50	10
+40	20
+30	10
+20	20
+10	10
+0	20
+0	10
diff --git a/data/i.sq b/data/i.sq
new file mode 100644
index 0000000..1631e41
--- /dev/null
+++ b/data/i.sq
@@ -0,0 +1,4 @@
+0	0
+10	0
+10	10
+0	10
diff --git a/data/i.tri b/data/i.tri
new file mode 100644
index 0000000..0f5a288
--- /dev/null
+++ b/data/i.tri
@@ -0,0 +1,3 @@
+0	0
+1	0
+1	1