H4sIAAA...
is the start of a base64-encoded gzipped string.
H4sI
H4sIA
H4sIAA
H4sIAAA
H4sIAAAA
H4sIAAAAA
H4sIAAAAAA
H4sIAAAAAAA
H4sIAAAAAAAA
H4sIAAAAAAAAA
If you see it in sans-serif, it might look like 'H4slAAA' (H4slAAA
)
H4sl
H4slA
H4slAA
H4slAAA
H4slAAAA
H4slAAAAA
H4slAAAAAA
H4slAAAAAAA
H4slAAAAAAAA
H4slAAAAAAAAA