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![Leetcode 2306. Naming a Company [hard] - grouping and counting method](/_next/image?url=https%3A%2F%2Fi.ytimg.com%2Fvi%2FWY3HQU0a5rE%2Fhq720.jpg%3Fsqp%3D-oaymwExCNAFEJQDSFryq4qpAyMIARUAAIhCGAHwAQH4Af4IgALQBYoCDAgAEAEYViBeKGUwDw%3D%3D%26rs%3DAOn4CLCC1TzpooVAArF3FftRY20ZA1C5sg&w=256&q=75)
