diff --git a/day4/input.txt b/day4/input.txt
new file mode 100644
index 0000000..6d5dca8
--- /dev/null
+++ b/day4/input.txt
@@ -0,0 +1,1000 @@
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+17-70,18-62
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+1-78,1-1
+3-97,2-2
\ No newline at end of file
diff --git a/day4/main1.py b/day4/main1.py
new file mode 100644
index 0000000..f8b11ac
--- /dev/null
+++ b/day4/main1.py
@@ -0,0 +1,31 @@
+with open("day4\input.txt") as f:
+    data = f.readlines()
+
+'''
+
+Some of the pairs have noticed that one of their assignments fully contains the other. 
+For example, 2-8 fully contains 3-7, and 6-6 is fully contained by 4-6. 
+In pairs where one assignment fully contains the other, one Elf in the pair would be 
+exclusively cleaning sections their partner will already be cleaning, 
+so these seem like the most in need of reconsideration.
+
+In how many assignment pairs does one range fully contain the other?
+
+'''
+pair_sum = 0
+line:str
+for line in data:
+
+    elf1 = [int(i) for i in line.split(',')[0].split('-')]
+    elf2 = [int(i) for i in line.split(',')[1].split('-')]
+
+    #Find the smallest 
+    if elf1[1] - elf1[0] > elf2[1] - elf2[0]:
+        if elf2[0] >= elf1[0] and elf2[1] <= elf1[1]:
+            pair_sum += 1
+    else:
+        if elf1[0] >= elf2[0] and elf1[1] <= elf2[1]:
+            pair_sum += 1
+
+
+print(pair_sum) #550
\ No newline at end of file
diff --git a/day4/main2.py b/day4/main2.py
new file mode 100644
index 0000000..e5a4577
--- /dev/null
+++ b/day4/main2.py
@@ -0,0 +1,34 @@
+with open("day4\input.txt") as f:
+    data = f.readlines()
+
+'''
+
+It seems like there is still quite a bit of duplicate work planned. Instead, the Elves would like to know the number of pairs that overlap at all.
+
+In how many assignment pairs do the ranges overlap?
+
+'''
+pair_sum = 0
+line:str
+for line in data:
+
+    elf1 = [int(i) for i in line.split(',')[0].split('-')]
+    elf2 = [int(i) for i in line.split(',')[1].split('-')]
+    #Example 77-88,14-78
+    # elf1 = 77-88
+    # elf2 = 14-78
+
+    #Find the smallest 
+    if elf1[1] - elf1[0] > elf2[1] - elf2[0]:
+        if elf2[0] >= elf1[0] and elf2[1] <= elf1[1]:
+            pair_sum += 1
+            continue
+    else:
+        if elf1[0] >= elf2[0] and elf1[1] <= elf2[1]:
+            pair_sum += 1
+            continue
+    #Look at elf 2's numbers and see if they are in elf 1's range
+    if elf1[0] <= elf2[0] <= elf1[1] or elf1[0] <= elf2[1] <= elf1[1]:
+        pair_sum +=1
+
+print(pair_sum) #931
\ No newline at end of file