 Complete the following phrase:  He immediately emigrated to Italy and signed with Inter Milan where he was to remain until 1968, winning three Serie A titles and two European Cups during his stay with the club, where he used a 532 formation, and modified a tactic known as the Verrou door bolt  used by Karl Rappan  to include larger flexibility for counter-attacks; thus, the Catenaccio system was born. The side was later nicknamed Grande Inter, due to the clubs successes under Herreras eightyear spell, which saw the team win backtoback European Cup titles in 1964 and 