Title: mark the letters

Task is updated to contain the solution.

Special signs that are now included

*Z* ÆÐƎƏ*Ɛ*ƔĲŊŒẞ

ÞǷȜæðǝəɛɣĳŋœĸſßþƿȝ

ĄƁÇĐƊĘĦĮƘŁ*Ø*Ơ

ŞȘŢȚŦŲƯY̨Ƴąɓçđɗęħ

įƙłøơşșţțŧųưy̨ƴ

ÁÀÂÄǍĂĀÃÅǺĄÆǼ

ǢƁĆĊĈČÇĎḌĐ

ƊÐÉÈĖ*Ê* ËĚĔĒĘẸƎƏ

ƐĠĜǦĞĢƔ

áàâäǎăāãåǻąæǽǣ

ɓćċĉčçďḍđ

ɗðéèėêëěĕēęẹǝəɛ

ġĝǧğģɣĤḤĦIÍÌİÎÏǏĬĪĨĮỊ

ĲĴĶƘĹĻŁĽĿʼNŃN̈ŇÑŅŊ

ÓÒÔÖǑŎŌÕŐỌØǾƠ

Œĥḥħıíìiîïǐĭīĩįịĳĵķƙĸĺļłľŀŉ

ńn̈ňñņŋóòôöǒŏōõőọøǿơœ

ŔŘŖŚŜŠŞȘṢẞŤŢṬŦÞ

ÚÙÛÜǓŬŪŨŰŮŲỤ

ƯẂẀŴẄǷÝỲŶŸȲỸƳ

ŹŻŽẒŕřŗſ

śŝšşșṣßťţṭŧþúùûüǔŭ

ūũűůųụưẃẁŵẅƿ

ýỳŷÿȳỹƴźżžẓ