American troops in crucial spots still hold the ring between rival groups.

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If Target is any guide, it is possible to ring the changes to suit different demographic groups and urban mixes without diluting the brand.

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The positive trading update had a familiar ring to it, since other supermarket groups in Britain have also surprised the market with strong sales over the holiday season: J Sainsbury's like-for-like sales rose by 3.7% in the 13 weeks to Jan. 2, while retail bellwether John Lewis said its sales rose 12.7% in the five weeks to Jan. 2.

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People who are trying to maintain separate work and personal lives may even set this to work after they leave the office, only allowing calls from certain groups (like family and close friends) to ring between 6 p.m. and 8 a.m.

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