Standard input is empty

Standard output is empty

./prog.sh: line 1: https://m...content-available-to-author-only...o.com/users/120446/uploads/0d8c4c11-889a-47dc-b628-3b34bec2c10a.pdf: No such file or directory
./prog.sh: line 2: https://c...content-available-to-author-only...o.com/: No such file or directory
./prog.sh: line 3: https://u...content-available-to-author-only...n.io/result/caa81ed5-276b-42f5-81d6-5c1e1e3d3b3e/: No such file or directory
./prog.sh: line 4: https://w...content-available-to-author-only...s.com/sample/aa84581351ace9cece779d1bf6ca8539cc92843fcc54db940415f28149b00658: No such file or directory
./prog.sh: line 5: https://p...content-available-to-author-only...a.io/projects/TXFHhARydnteEX7kmRIAcQ: No such file or directory
./prog.sh: line 6: https://w...content-available-to-author-only...r.com/question/5f2be1897bb211235d4df8f0: No such file or directory
./prog.sh: line 7: https://d...content-available-to-author-only...t.org/paste/fd9a6a95: No such file or directory
./prog.sh: line 9: https://p...content-available-to-author-only...o.com/xPCdnH33RXLc: No such file or directory