diff --git a/main.py b/main.py
index ff18145..8be5d09 100644
--- a/main.py
+++ b/main.py
@@ -150,16 +150,15 @@ def main(driver: WebDriver, logger = logging.getLogger('main')):
 
             for col in range(1, self.wb.active.max_column + 1):
                 value = str(self.wb.active.cell(1, col).value)
-                if value in keys: self.headers[value] = col
+                self.headers[value] = col
 
             for row in range(1, self.wb.active.max_row + 1):
-                for key in keys:
-                    col = self.headers[key]
+                for key, col in map(lambda k: (k, self.headers[k]), keys):
                     value = str(self.wb.active.cell(row, col).value)
                     self.indices.setdefault(key, dict())[value] = row
 
-        def at(self, by: str, index) -> dict:
-            if (a := self.indices.get(by)) is None or (b := dict.get(a, index)) is None: return dict()
+        def at(self, axis: str, index) -> dict:
+            if (a := self.indices.get(axis)) is None or (b := dict.get(a, index)) is None: return dict()
             return { k: self.wb.active.cell(b, c).value for k, c in self.headers.items() }
 
     try: