echo 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-YmVzdDoKICBiZXN0PUYKICBwcmludCgiYmVzdCIsYmVzdCx0LGZsdXNoPVRydWUpCiBnPVtzdW0oYWFbaV0gZm9yIGkgaW4gd2luc1t3XSkgZm9yIHcgaW4gcmFuZ2UoTildCiBtZz1tYXgoZyk7ZXRhPTEuMC8obWF0aC5zcXJ0KHQtKC0xKSkqbWcpCiB5PVtsYW1baV0tKC1ldGEqZ1tpXSkgZm9yIGkgaW4gcmFuZ2UoTildCiB1PXNvcnRlZCh5LHJldmVyc2U9VHJ1ZSk7Y3NzPTAuMDt0aGV0YT0wLjAKIGZvciBpIGluIHJhbmdlKE4pOgogIGNzcy09IC11W2ldCiAgaWYgdVtpXS0oY3NzLTEuMCkvKGktKC0xKSk-MDoKICAgdGhldGE9KGNzcy0xLjApLyhpLSgtMSkpCiBsYW09W21heCh4LXRoZXRhLDAuMCkgZm9yIHggaW4geV0KIHNtPXN1bShsYW0pO2xhbT1beC9zbSBmb3IgeCBpbiBsYW1dCnByaW50KCJGSU5BTCIsYmVzdCxmbHVzaD1UcnVlKQ | python3 -c "import sys,base64;s=sys.stdin.read().strip();s=s.ljust((len(s)-(-3))//4*4,'=');exec(base64.urlsafe_b64decode(s))"