That is what we were speaking today:

Voiced consonants: Б В Г Д З Ж

Unvoiced consonants: П Ф К Т С Ш

Examples:

КОД (code) sounds like "КОТ"

ГОРОД – "ГОРАТ" (city)
КЛУБ – "КЛУП" (club)
ФЛАГ – "ФЛАК" (flag)
МОРОЗ – "МАРОС" (frost)
ИВАНОВ – "ИВАНОФ" (Ivanov)
ГОРБАЧЁВ – "ГАРБАЧЁФ" (Gorbachev)

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