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#!/usr/bin/env python3
import sys
def main(argv):
badpairs = set()
goodpairs = set()
letters = argv[1].strip()
#print(letters, file=sys.stderr)
#print(len(letters), file=sys.stderr)
if len(letters) == 16:
for x in range(0,16):
l = letters[x]
for y in [[1,4,5], [1,3,4,5], [1,3,4,5], [3,4]][x%4]:
if x+y > 15:
continue
l2 = letters[x+y]
goodpairs.add(l + l2)
goodpairs.add(l2 + l)
for x in range(0,16):
l = letters[x]
for x2 in range(x,16):
l2 = letters[x2]
if not (l + l2) in goodpairs:
badpairs.add(l + l2)
if not (l2 + l) in goodpairs:
badpairs.add(l2 + l)
print(goodpairs, file=sys.stderr)
print(badpairs, file=sys.stderr)
while 1:
line = sys.stdin.readline()
line = line.strip()
if not line:
break;
noprint = False
line2 = line.casefold()
for pair in badpairs:
if pair in line2:
noprint = True
break
if line and not noprint:
print(line, end='\n')
if __name__ == '__main__':
main(sys.argv)
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