The word "STICA" is spelled using the IPA phonetic transcription: /ˈstɪkə/. The first sound in this word is the voiceless alveolar sibilant /s/. This is followed by the voiceless palato-alveolar affricate /tʃ/. The third sound is the close front unrounded vowel /ɪ/. The fourth sound is the voiceless velar fricative /x/. Finally, the word ends with the schwa sound /ə/. So, the correct spelling of "STICA" is with an "S" followed by "T" then "I" and "C" and finally an "A".