diff --git a/inputs/example.25 b/inputs/example.25
new file mode 100644
index 0000000..027aeec
--- /dev/null
+++ b/inputs/example.25
@@ -0,0 +1,13 @@
+1=-0-2
+12111
+2=0=
+21
+2=01
+111
+20012
+112
+1=-1=
+1-12
+12
+1=
+122
diff --git a/inputs/input.25 b/inputs/input.25
new file mode 100644
index 0000000..ce170c3
--- /dev/null
+++ b/inputs/input.25
@@ -0,0 +1,111 @@
+1=021=20---11-1=1
+222==-=1-2=-11-11
+1010==0=0=1--=1
+2
+1122=
+2222==2222-2--10
+100=-2-002=
+12221-2-10-=1=
+1-=211000=221-1
+2=--12==11221-2-002
+1101==-01===01=
+220=0=-2-1-0===10=2
+2-0-
+1=-12=2==
+1-=-02==-1
+100-0-11--02--0=-
+1==0-1220011=-
+21
+1102-22==
+222
+1==0=22-0--011-0
+1020
+2==2-102
+1010-02==02=
+1=1
+2=010==12022=
+1=-22001-2=
+101=2-201122111
+1=-0021211-1-1-1202
+2-22-2
+1212002==1
+2=-0-
+1-1==1122110100
+1--020-2-=-0-21--
+2=22-21220022==1=
+1=-00-121-20-2122
+1-==-00
+20=21=0
+20-02-0-=-==-=22
+1120==-2
+2=--0-0-000201=101
+1---=02=21
+1-011
+211-2112=20--2
+1=-
+1=--=021
+1-1-122200==1-1111
+11001-
+200=200
+1===21=1-2
+1===10
+2=22
+10-110210=01112-
+2121=1=2=-201-
+1---2=-0=-
+211-120---000=-0-
+1-
+1-101-2=01020=-0=
+112-12--0=12=12--
+1-0-=2--=--12=20
+1=0=-121
+1000122-210--011200
+120==-1-=01
+1=2=1--
+101-1=--2-
+2=
+2--10
+2201020-=2-
+1===2001-1=0=
+222=-2---2=112
+2010=-22=012=202=
+111
+1-2112=0200=1
+2=02211=2
+2-121
+1----12=-2011
+2==0
+112
+22=0==1-1=
+1-20=0-
+1=110211-022201222
+20
+1-111
+1=-=022011=2=2=1
+1-02122
+2-1
+1-2-=2-0=0---
+1-20
+1=1=102
+1=1=0--1
+11222-==0101-
+2122100=0
+2011==12-10
+210--121-0=
+22121=01=0=-=-=-==
+10-0-=1-12
+2-2=21
+1=1-0-0-
+10020
+10-0-0120=211-2-
+1-==10-0-==001201-
+1-0
+21=00202002-0
+1-1=2021
+11=1==1=0
+1=102-1=-20-0
+2=100-12-0=
+1=0
+1--=
+12=212110200-
+222002100
diff --git a/main.go b/main.go
index 9054cd1..a8d4aea 100644
--- a/main.go
+++ b/main.go
@@ -21,6 +21,7 @@ import (
 	"github.com/acw/advent2022/solutions/day22"
 	"github.com/acw/advent2022/solutions/day23"
 	"github.com/acw/advent2022/solutions/day24"
+	"github.com/acw/advent2022/solutions/day25"
 	"github.com/acw/advent2022/solutions/day3"
 	"github.com/acw/advent2022/solutions/day4"
 	"github.com/acw/advent2022/solutions/day5"
@@ -85,6 +86,8 @@ func main() {
 		day23.Run(os.Args[2])
 	case "day24":
 		day24.Run(os.Args[2])
+	case "day25":
+		day25.Run(os.Args[2])
 	default:
 		fmt.Println("PANIC! Unknown day.")
 	}
diff --git a/solutions/day25/day25.go b/solutions/day25/day25.go
new file mode 100644
index 0000000..b5166eb
--- /dev/null
+++ b/solutions/day25/day25.go
@@ -0,0 +1,76 @@
+package day25
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func valueOf(r rune) int {
+	switch r {
+	case '2':
+		return 2
+	case '1':
+		return 1
+	case '0':
+		return 0
+	case '-':
+		return -1
+	case '=':
+		return -2
+	default:
+		fmt.Println("PANIC PANIC")
+		return 23489
+	}
+}
+
+func Run(filename string) {
+	file, err := os.Open(filename)
+	if err != nil {
+		fmt.Println("Error opening file:", err)
+		return
+	}
+
+	scanner := bufio.NewScanner(file)
+	scanner.Split(bufio.ScanLines)
+	runningTotal := 0
+
+	for scanner.Scan() {
+		line := []rune(scanner.Text())
+
+		current := 0
+		place := 1
+		for x := len(line) - 1; x >= 0; x-- {
+			r := line[x]
+			current += (place * valueOf(r))
+			place *= 5
+		}
+
+		fmt.Println("Coverted", line, "==>", current)
+		runningTotal += current
+	}
+	file.Close()
+
+	fmt.Println("Running total", runningTotal)
+	output := ""
+
+	for runningTotal != 0 {
+		runningTotal += 2
+		digit := runningTotal % 5
+		runningTotal /= 5
+
+		switch digit {
+		case 4:
+			output = "2" + output
+		case 3:
+			output = "1" + output
+		case 2:
+			output = "0" + output
+		case 1:
+			output = "-" + output
+		case 0:
+			output = "=" + output
+		}
+	}
+	fmt.Println("Which is", output, "in SNAFU.")
+}