diff --git a/day3/day3.lua b/day3/day3.lua
new file mode 100644
index 0000000..0d3d316
--- /dev/null
+++ b/day3/day3.lua
@@ -0,0 +1,32 @@
+file = io.open("input")
+io.input(file)
+
+score = 0
+
+for line in file:lines() do
+    local first = string.sub(line, 1, #line/2)
+    local second = string.sub(line, #line/2 + 1, #line)
+    print(#first)
+    print(#second)
+    for i = 1, #first do
+        local char = string.sub(first, i, i)
+
+        if string.match(second, char) then
+            print(char)
+            if char == string.upper(char) then
+                --print(string.byte(char) - string.byte("A") + 27)
+                score = score + string.byte(char) - string.byte("A") + 27
+                goto continue
+            elseif char == string.lower(char) then
+                --print(string.byte(char) - string.byte("a"))
+                score = score + string.byte(char) - string.byte("a") + 1
+                goto continue
+            end
+        end
+
+    end
+
+    ::continue::
+end
+
+print(score)
diff --git a/day3/day3part2.lua b/day3/day3part2.lua
new file mode 100644
index 0000000..de83ba1
--- /dev/null
+++ b/day3/day3part2.lua
@@ -0,0 +1,33 @@
+file = io.open("input")
+io.input(file)
+
+score = 0
+data = {}
+
+for line in file:lines() do
+    table.insert(data, line)
+end
+
+for i = 1, #data/3 do
+    local one = data[(i-1)*3+1]
+    local two = data[(i-1)*3+2]
+    local three = data[(i-1)*3+3]
+
+    for n = 1, #one do
+        local char = string.sub(one, n, n)
+        if string.match(two, char) and string.match(three, char) then
+            if char == string.upper(char) then
+                score = score + string.byte(char) - string.byte("A") + 27
+                goto continue
+            elseif char == string.lower(char) then
+                score = score + string.byte(char) - string.byte("a") + 1
+                goto continue
+            end
+        end
+
+    end
+
+    ::continue::
+end
+
+print(score)
diff --git a/day3/input b/day3/input
new file mode 100644
index 0000000..0e4ee5e
--- /dev/null
+++ b/day3/input
@@ -0,0 +1,300 @@
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diff --git a/day3/input2 b/day3/input2
new file mode 100644
index 0000000..5dd26a1
--- /dev/null
+++ b/day3/input2
@@ -0,0 +1,12 @@
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diff --git a/day3/input3 b/day3/input3
new file mode 100644
index 0000000..f17e726
--- /dev/null
+++ b/day3/input3
@@ -0,0 +1,6 @@
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