export declare type TokenType = string;
export declare type CurrentTokensType = TokenType[];
export declare type NGramType = {
    current: CurrentTokensType;
    next: TokenType;
};
export declare type ExperienceType = {
    [key: string]: {
        candidates: {
            [key: string]: {
                original: TokenType;
                count: number;
            };
        };
        total: number;
    };
};
export default class NGram {
    n: number;
    experience: ExperienceType;
    constructor(n: number);
    tokensToKey(tokens: CurrentTokensType): string;
    getExperience(currentTokens: CurrentTokensType): {
        candidates: {
            [key: string]: {
                original: string;
                count: number;
            };
        };
        total: number;
    };
    addExperience(gram: NGramType): void;
    getNextToken(currentTokens: CurrentTokensType): string | false;
    train(str: string): void;
    guess(starter?: string, length?: number): string[];
}