diff --git a/day03/engine-schema.go b/day03/engine-schema.go
new file mode 100644
index 0000000..dc7cc7b
--- /dev/null
+++ b/day03/engine-schema.go
@@ -0,0 +1,68 @@
+
+package main
+
+import (
+    "fmt"
+//    "strings"
+    "bufio"
+    "os"
+    "regexp"
+    "strconv"
+)
+
+func check(e error) {
+    if e != nil {
+        panic(e)
+    }
+}
+
+func PrintAndWait[T any](x T) {
+    fmt.Print(x)
+    fmt.Scanln() 
+}
+
+func main() {
+	file, err := os.Open("./inputs/day03_test_input")
+	check(err)
+	defer file.Close()
+
+	// This regex find the numbers inside strings
+	renum := regexp.MustCompile("[0-9]+")
+	resym := regexp.MustCompile("[^0-9.]+")
+
+	scanner := bufio.NewScanner(file)
+	var lines []string
+
+	// Read the whole file into an array of strings
+	for scanner.Scan() {
+    	lines = append(lines, scanner.Text())
+	}
+	numLines := len(lines)
+
+	// The 2D array of numbers will hold all the numbers to easily
+	// match them with corresponding strings in the file using the index
+	numbers := make([][]int, numLines)
+	// For every line in the file, cerate an array of numbers
+	for i := 0; i < numLines; i++ {
+    	tempNums := renum.FindAllString(lines[i], -1)
+    	for j := 0; j < len(tempNums); j++ {
+    		num, _ := strconv.Atoi(tempNums[j])
+    		numbers[i] = append(numbers[i], num)
+    	}
+	}
+
+	// We store the index of a symbol on the line it appears
+	symbolsIndex 	:= make([][]int, numLines)
+	symbols 		:= make([][]string, numLines) 
+	_ = symbolsIndex
+	// For every line
+	for i := 0; i < numLines; i++ {
+		// We put all the symbols in a string
+		tempSymbols := resym.FindAllString(lines[i], -1)
+		// We associate symbols with an index
+		tempSymbolsIndex := resym.FindAllStringIndex(lines[i], -1)
+		// Add symbols and indexes to the arrays
+		symbols = append(symbols, tempSymbols)
+		//symbolsIndex = append(symbolsIndex, tempSymbolsIndex) 
+	}
+}
diff --git a/day03/inputs b/day03/inputs
new file mode 120000
index 0000000..a80bb2b
--- /dev/null
+++ b/day03/inputs
@@ -0,0 +1 @@
+../inputs
\ No newline at end of file