1 files changed, 27 insertions, 0 deletions
diff --git a/zanagrams/onceletters.py b/zanagrams/onceletters.py
new file mode 100755
index 0000000..ede75db
--- /dev/null
+++ b/zanagrams/onceletters.py
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+import sys
+
+def main(argv):
+  #print(argv[2], file=sys.stderr)
+  allowed_times = int(argv[2]) if len(argv) > 2 else 1
+  #print(allowed_times, file=sys.stderr)
+  while 1:
+    letters_counts = {}
+    line = sys.stdin.readline()
+    noprint = False
+    if not line:
+        break;
+    for c in line:
+      #print(c)
+      c = c.casefold()
+      letters_counts[c] = letters_counts.get(c, 0) + 1
+      if letters_counts[c] > allowed_times and c in argv[1]:
+        #print('oops')
+        noprint = True
+        break
+    if line and not noprint:
+      print(line, end='')
+
+if __name__ == '__main__':
+  main(sys.argv)
+