diff --git a/noid.py b/noid.py
new file mode 100644
index 0000000..f4519d4
--- /dev/null
+++ b/noid.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python
+
+from dataclasses import dataclass, field
+from typing import ClassVar
+
+@dataclass
+class Counter():
+    top: int
+    value: int
+
+
+@dataclass
+class Minter():
+    legalstring: ClassVar[str] = "0123456789bcdfghjkmnpqrstvwxz"
+    alphacount: ClassVar[int] = len(legalstring)
+    digitcount: ClassVar[int] = 10
+    
+    oacounter: int = 0
+    template: str = ""
+    total: int = 0
+    prefix: str = ""
+    mask: str = ""
+    active_counters: list[Counter] = field(default_factory=list)
+    inactive_counters: list[Counter] = field(default_factory=list)
+
+    def parse_template(self, template: str) -> int:
+        """
+        >>> m = Minter()
+        >>> m.parse_template("test")
+        -1
+        >>> m.template
+        'test'
+        >>> m.prefix
+        ''
+        >>> m.mask
+        'test'
+        >>> m.parse_template("testkktest")
+        -1
+        >>> m.parse_template("rtesk")
+        -1
+        >>> m.parse_template("rteksk")
+        -1
+        >>> m.parse_template("rtkkes")
+        -1
+        >>> m.parse_template("reded")
+        84100
+        >>> m.parse_template("ed")
+        -1
+        >>> m.parse_template("red")
+        290
+        >>> m.parse_template("redk")
+        290
+        """
+        self.template = template
+        template = template.strip().removesuffix('/').strip()
+        try:
+            self.prefix, *_, self.mask = template.split(".")
+        except ValueError:
+            self.prefix = ""
+            self.mask = template
+
+        if self.mask[0] not in ("r", "s", "z"):
+            return -1  # mask must begin with of the letters: r, s or z
+        if "k" in self.mask and (self.mask.count("k") > 1 or self.mask[-1] != "k"):
+            return -1
+        if not all(char in ("d", "e") for char in self.mask.rstrip("k")[1:]):
+            return -1
+        self.total = 1
+        for chr in self.mask:
+            match chr:
+                case "e":
+                    self.total *= self.alphacount
+                case "d":
+                    self.total *= self.digitcount
+        return self.total
+
+
+if __name__ == "__main__":
+    import doctest
+    doctest.testmod()
diff --git a/uv.lock b/uv.lock
new file mode 100644
index 0000000..dc242b1
--- /dev/null
+++ b/uv.lock
@@ -0,0 +1,8 @@
+version = 1
+revision = 3
+requires-python = ">=3.14"
+
+[[package]]
+name = "noid"
+version = "0.1.0"
+source = { virtual = "." }