A theme can be subtle.Logical formLearned from74 sentences. Changes can be subtle.Logical formLearned from73 sentences. A strategy can be subtle.Logical formLearned from73 sentences. Complexities can be subtle.Logical formLearned from73 sentences. Undertones can be subtle.Logical formLearned from73 sentences. A sign can be subtle.Logical formLearned from72 sentences. A sound can be subtle.Logical formLearned from72 sentences. Connections can be subtle.Logical formLearned from72 sentences. Expressions can be subtle.Logical formLearned from71 sentences. Lines can be subtle.Logical formLearned from71 sentences. Hues can be subtle.Logical formLearned from71 sentences. Signs can be subtle.Logical formLearned from70 sentences. Colours can be subtle.Logical formLearned from69 sentences. A charm can be subtle.Logical formLearned from69 sentences. Threats can be subtle.Logical formLearned from69 sentences.