Pronunciation: [sˌiːˌɛnˌɛnsˈiː] (IPA)
Correct spelling for the English word "cnnc" is [sˌiːˌɛnˌɛnsˈiː], [sˌiːˌɛnˌɛnsˈiː], [s_ˌiː__ˌɛ_n_ˌɛ_n_s_ˈiː] (IPA phonetic alphabet).