uses crt;
var count,i:integer;
s,str:string;
BEGIN
WRITE('Введите строку: ');
READ(s);
WRITE('Введите буквосочетание из 2 букв: ');
READ(str);
count:=0;
FOR i:=1 to length(s) DO BEGIN
if ((str[1]=s[i]) and (str[2]=s[i+1])) then BEGIN
inc(count);
i:=i+1;
END;
END;
WRITE('Количество заданных буквосочетаний в строке: ', count);
END.
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