diff --git a/data/dualvariables.txt b/data/dualvariables.txt
deleted file mode 100644
index 3cf12bf2358011f6c46717bbf2d158f6d375ace3..0000000000000000000000000000000000000000
--- a/data/dualvariables.txt
+++ /dev/null
@@ -1,100 +0,0 @@
-C1: 0
-C2: 2
-C3: 15
-C4: 9
-C5: 11
-C6: 4
-C7: 0
-C8: 14
-C9: 14
-C10: 19
-C11: 8
-C12: 10
-C13: 17
-C14: 0
-C15: 1
-C16: 11
-C17: 14
-C18: 0
-C19: 8
-C20: 1
-C21: 8
-C22: 14
-C23: 12
-C24: 19
-C25: 17
-C26: 11
-C27: 1
-C28: 13
-C29: 8
-C30: 14
-C31: 19
-C32: 16
-C33: 5
-C34: 0
-C35: 15
-C36: 6
-C37: 13
-C38: 15
-C39: 20
-C40: 7
-C41: 5
-C42: 20
-C43: 15
-C44: 15
-C45: 13
-C46: 1
-C47: 13
-C48: 18
-C49: 5
-C50: 9
-C51: 16
-C52: 10
-C53: 4
-C54: 5
-C55: 7
-C56: 3
-C57: 10
-C58: 18
-C59: 19
-C60: 1
-C61: 18
-C62: 10
-C63: 10
-C64: 6
-C65: 20
-C66: 10
-C67: 5
-C68: 1
-C69: 19
-C70: 1
-C71: 10
-C72: 8
-C73: 5
-C74: 19
-C75: 11
-C76: 9
-C77: 19
-C78: 1
-C79: 15
-C80: 16
-C81: 17
-C82: 2
-C83: 0
-C84: 14
-C85: 18
-C86: 13
-C87: 15
-C88: 15
-C89: 20
-C90: 18
-C91: 4
-C92: 6
-C93: 7
-C94: 10
-C95: 12
-C96: 17
-C97: 8
-C98: 17
-C99: 5
-C100: 8
\ No newline at end of file
diff --git a/data/dualvariables1.txt b/data/dualvariables1.txt
new file mode 100644
index 0000000000000000000000000000000000000000..84d3ba125b851fea5fe63b8aaa9888c7adf5c0b2
--- /dev/null
+++ b/data/dualvariables1.txt
@@ -0,0 +1,100 @@
+C1	0
+C2	2
+C3	15
+C4	9
+C5	11
+C6	4
+C7	0
+C8	14
+C9	14
+C10	19
+C11	8
+C12	10
+C13	17
+C14	0
+C15	1
+C16	11
+C17	14
+C18	0
+C19	8
+C20	1
+C21	8
+C22	14
+C23	12
+C24	19
+C25	17
+C26	11
+C27	1
+C28	13
+C29	8
+C30	14
+C31	19
+C32	16
+C33	5
+C34	0
+C35	15
+C36	6
+C37	13
+C38	15
+C39	20
+C40	7
+C41	5
+C42	20
+C43	15
+C44	15
+C45	13
+C46	1
+C47	13
+C48	18
+C49	5
+C50	9
+C51	16
+C52	10
+C53	4
+C54	5
+C55	7
+C56	3
+C57	10
+C58	18
+C59	19
+C60	1
+C61	18
+C62	10
+C63	10
+C64	6
+C65	20
+C66	10
+C67	5
+C68	1
+C69	19
+C70	1
+C71	10
+C72	8
+C73	5
+C74	19
+C75	11
+C76	9
+C77	19
+C78	1
+C79	15
+C80	16
+C81	17
+C82	2
+C83	0
+C84	14
+C85	18
+C86	13
+C87	15
+C88	15
+C89	20
+C90	18
+C91	4
+C92	6
+C93	7
+C94	10
+C95	12
+C96	17
+C97	8
+C98	17
+C99	5
+C100 8
diff --git a/data/dualvariables2.txt b/data/dualvariables2.txt
new file mode 100644
index 0000000000000000000000000000000000000000..eae5a0d274b27abb851eb1147c871ad23b92d4f0
--- /dev/null
+++ b/data/dualvariables2.txt
@@ -0,0 +1,100 @@
+C1	20
+C2	14
+C3	17
+C4	12
+C5	18
+C6	0
+C7	11
+C8	0
+C9	8
+C10	7
+C11	1
+C12	8
+C13	6
+C14	9
+C15	20
+C16	1
+C17	16
+C18	11
+C19	12
+C20	16
+C21	3
+C22	15
+C23	16
+C24	9
+C25	18
+C26	17
+C27	0
+C28	6
+C29	14
+C30	16
+C31	17
+C32	1
+C33	1
+C34	16
+C35	14
+C36	11
+C37	7
+C38	2
+C39	5
+C40	20
+C41	11
+C42	9
+C43	3
+C44	0
+C45	1
+C46	4
+C47	17
+C48	4
+C49	14
+C50	1
+C51	3
+C52	12
+C53	3
+C54	7
+C55	14
+C56	7
+C57	12
+C58	16
+C59	9
+C60	9
+C61	4
+C62	3
+C63	10
+C64	11
+C65	20
+C66	19
+C67	13
+C68	14
+C69	20
+C70	16
+C71	13
+C72	14
+C73	11
+C74	9
+C75	0
+C76	11
+C77	18
+C78	9
+C79	13
+C80	6
+C81	19
+C82	12
+C83	10
+C84	17
+C85	15
+C86	12
+C87	18
+C88	12
+C89	7
+C90	20
+C91	0
+C92	16
+C93	10
+C94	17
+C95	1
+C96	9
+C97	8
+C98	13
+C99	8
+C100 20
diff --git a/data/dualvariables3.txt b/data/dualvariables3.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b5d19dd7c7d4b50e559775c8ecdc5f6650ca5538
--- /dev/null
+++ b/data/dualvariables3.txt
@@ -0,0 +1,100 @@
+C1	6
+C2	5
+C3	14
+C4	3
+C5	11
+C6	10
+C7	18
+C8	7
+C9	12
+C10	15
+C11	4
+C12	13
+C13	12
+C14	0
+C15	17
+C16	19
+C17	17
+C18	0
+C19	4
+C20	9
+C21	2
+C22	6
+C23	5
+C24	4
+C25	20
+C26	18
+C27	1
+C28	13
+C29	13
+C30	11
+C31	5
+C32	5
+C33	8
+C34	0
+C35	4
+C36	14
+C37	13
+C38	18
+C39	9
+C40	2
+C41	1
+C42	17
+C43	14
+C44	16
+C45	12
+C46	12
+C47	6
+C48	0
+C49	17
+C50	11
+C51	6
+C52	1
+C53	10
+C54	11
+C55	17
+C56	6
+C57	20
+C58	6
+C59	11
+C60	11
+C61	14
+C62	1
+C63	15
+C64	19
+C65	12
+C66	10
+C67	1
+C68	8
+C69	16
+C70	12
+C71	8
+C72	17
+C73	6
+C74	2
+C75	2
+C76	2
+C77	14
+C78	13
+C79	17
+C80	0
+C81	4
+C82	3
+C83	2
+C84	7
+C85	10
+C86	9
+C87	16
+C88	4
+C89	9
+C90	13
+C91	15
+C92	6
+C93	16
+C94	17
+C95	7
+C96	20
+C97	7
+C98	16
+C99	14
+C100 12